A new traffic calming feature has showed up on 16th Street approaching R Street in midtown Sacramento. Paint and flex posts have been placed between the travel lanes. Advance yield lines (‘sharks teeth’) were also painted, showing where drivers should stop when yielding to pedestrians.
I’m not sure what to think of this. Certainly this is a problematic intersection. Cars stopped for the light rail gates between R Street and Q Street often stop throughout the intersection, blocking both the north and south crosswalks over 16th Street, as well as the intersection itself, preventing vehicles along R Street from proceeding while the traffic is stopped. As with all multilane streets, but particularly high speed, one-way arterials, drivers in one lane may stop for a walker while the others will not. I see this every day, and this intersection is worse than most. For reasons I don’t understand, traffic speeds on 16th Street northbound are noticeably higher than 15th Street southbound, even though the design of both streets in the same.
So, how’s it working. Well, I’ve so far only had the chance to observe it for 15 minutes. I’m not sure it is making much difference. About 10% of drivers stopped at or close to the advance yield lines. About 70% of drivers stopped at the forward edge of the flex posts, about 10% stopped over the crosswalk, and about 10% did not stop for people using the crosswalk. I saw three people nearly hit by drivers. This is not unusual, and it not worse than before, but it is not good.
Below is an example. The driver to the left stopped over the top of the crosswalk, even though it was clear that traffic ahead was stopped for the light rail gate, and there was no space to proceed into. The driver to the right stopped before the crosswalk, but not at the advance yield line. Not visible it the driver in the closest lane who did not stop at all because there was a space in that lane across the intersection.
While I appreciate the effort, I’m not sure if the results will be what is desired, which is the ability of walkers to safely cross the street.
In the long run, the reallocation of roadway on 16th Street to reduce the general purpose lanes from three to two will help this location a great deal, but I don’t know when that will happen. It could be years away.
With the new businesses on R Street to the east, and the street dining area on R Street to the west of 15th Street, this intersection has become quite busy with walkers, bicyclists, scooters, and motor vehicles. It does deserve attention.
While walking in the central city today, I saw this brand new curb ramp on the southwest corner of X Street and 24th Street.
Why, why, why, did the city put in a diagonal curb ramp when they should have put in a two perpendicular ramps? Though I’ve searched in vain through city documents looking to see what the criteria is for a single ramp per corner versus two ramps per corner, I have heard it said by city staff that the single ramps are for residential neighborhoods and the two ramps are for urban neighborhoods. This is definitely an urban neighborhood setting, with both 24th Street and X Street being arterials. Yet the city put in a single ramp. They call this a ‘single flare curb ramp’. What should have been installed here is a ‘standard curb ramp’. The city diagrams do not show exactly this situation, where there is a sidewalk buffer (planter strip) on X Street, with an attached sidewalk on 24th Street, but the diagram below is the closest to the situation.
If the city development code does not specify that single, diagonal ramps should be used only in purely residential situations (if even there), it should be modified to be so.
2021-03-12: Adding a photo that better shows the context for this diagonal ramp. This is the southwest corner, X Street to the right and 24th Street to the left. There is space for perpendicular ramps. Of course this would have been a great location for a curb extension (bulb out) on both 24th Street and X Street, but yes, that would be significantly more expensive and might involve drainage issues.
2021-03-17: Adding a photo of a new curb ramp in the same area of town, at 22nd Street and W Street, showing the correct perpendicular curb ramps. It isn’t that the city doesn’t know how to do it right, it is that they chose not to at the intersection of X Street and 24th Street.
Another reminder from Enzo. He commented on how dangerous the Watt Ave & Auburn Blvd intersection is, which led to a discussion about the entire section of Watt Ave between the Watt/I-80 light rail station and Auburn Blvd. He pointed out the absolutely ridiculous crosswalk and sidewalk at the westbound onramp to I-80 Business.
As you can see, the sidewalk leading down to, or up from, the crosswalk on the left hand side is quite steep. It would not be navigable by anyone in a wheelchair, or with any mobility limitations, and Enzo said that even an able bodied person would have difficulty with it. I only walked this sidewalk on the west side of Watt Ave once, and it was such an unpleasant experience that I never did it again. This particular issue did not stand out in my mind because the entire section was so uniformly unpleasant and dangerous.
As you can see in the Google overhead view, this onramp has a long approach, so most drivers are already going 65 mph when they hit the crosswalk (the speed limit on Watt Ave is 45 mph). So anyone using this crosswalk would be likely to die. For drivers, there is no warning of the crosswalk ahead, and so no reason to take the onramp more slowly. The crosswalk is not even a high visibility crosswalk, but the outmoded two stripe version which can’t even be seen when the pavement is wet.
And very few people do use this sidewalk and this crosswalk. When I worked in the eastern suburbs, I initially took light rail and then bicycled south to Auburn Blvd, but with no bicycle facilities and high speed traffic, that got old very quickly. So then I started taking the SacRT bus Route 1. Currently, this bus route starts and ends at light rail, though it used to go further north. I wondered why so many people got on the bus westbound at the last stop on Auburn, and got off the bus eastbound at the first stop on Auburn. So I asked them, and every person said it was to avoid this section of Watt Avenue between light rail and Auburn Blvd. They said the onramps and off-ramps made it just too dangerous to walk. I wasn’t able to talk to any bicyclists, but I’m sure they would have said the same.
This is Caltrans design, and it was designed to not be usable by people walking. This was the entire design philosophy of Caltrans, to discourage walkers and bicyclists from being anywhere near a highway.
Caltrans has reformed somewhat. For example, when the Watt Ave & Hwy 50 interchange was improved in 2015, a separated walking path and bikeway was created that when under the eastbound onramp, westbound onramp, and westbound off-ramp on the east side of Watt, then along the Watt Ave overpass. In the aerial below, you can see the pathway which loops to gain the elevation from the under tunnel to the bridge height. Note, however, that there is no matching facility on the west side of Watt Ave, so a walker or bicyclist must cross to the east side at the nearest intersection, which is Folsom Blvd to the south and La Riviera Drive to the north. Though not great, it is a considerable improvement over what was there before. It did, however, solidify the status of Watt Avenue as an expressway rather than an arterial street.
As you can see from the photo at the beginning, and the Watt/Hwy 50 example, the only way to solve this issue is with some sort of flyover for the sidewalk, so that there is an ADA compatible gradient and no crosswalk over the ramp. I’m expecting that Caltrans will start that project in about 2121. There was a proposal by SacRT to improve the section of Watt Ave between light rail and Auburn because they recognized that the walker and bicyclist hostile nature of the corridor was reducing use of light rail. But the city and Caltrans did not seem interested.
Though Caltrans created these hazards, and the hazard is clearly on Caltrans property, the agency has shown little interest in solving the problems they created. They have washed their hands of the roadway part of interchanges by handing these over to the cities or counties. Their preference remains building new stuff rather than maintaining and correcting existing freeways and highways, and I’m not at all sure that will ever change.
As promised, a follow-on to my post on the top bicycle collision intersections in Sacramento (Sac Vision Zero Top 5 Corridors and top intersections), here is the same sort of analysis for pedestrian collisions. I used a somewhat different data set, this time only killed and severe injury crashes (KSI), for the years 2009-2017. This mirrors the data the city used in the Vision Zero Top 5 Corridors document, and so is not directly comparable to the different criteria I used on the bicycle post.
Pedestrian (walker) collisions are more dispersed that bicycle collisions, fewer occurring at intersections and more in between. Of the 408 collisions, 70 were at intersections, 17%, compared to 69% for bicycle collisions. Of these 408 collisions, twelve intersections stood out: Amherst St & Florin Rd, Marysville Blvd & Grand Ave, and Watt Ave & Auburn Blvd, each with three; and 15th St & Capitol Mall, 29th St & Florin Rd, 5th St & N St, 7th St & J St, Stockton Blvd & Broadway, Stockton Blvd & Lemon Hill Ave, Riverside Dr & X St, and Julliard Dr & Kiefer Blvd & Folsom Blvd, each with two. Of these 12 intersections, 4 are on Top Five corridors: Marysville Blvd & Grand Ave on the Marysville corridor, Stockton Blvd & Broadway on the Stockton-Broadway corridor, Stockton Blvd & Lemon Hill Ave on the South Stockton corridor, and 29th St & Florin Rd on the Florin corridor.
The map belows shows the city corridors and the twelve intersections, with the number of collisions and intersection name labeled. There is also a pdf available.
There is a better alignment between the five designated corridors and pedestrian collision intersections than was true for bicycle collisions.
I will point out that the Julliard Dr & Kiefer Blvd & Folsom Blvd intersection is the site of three pedestrian collisions and four bicycle collisions, which is higher than any other intersection in the city. It should really be a focus for the city.
Addition 2021-03-02: Someone asked how the pedestrian collision locations relate to disadvantaged communities. Below, a map with CalEnviroScreen 3 2018-06 (CES) layer, with red end being higher pollution, green being lower, and weighted with income. CES is not the only measure of disadvantage, but it is one commonly used.
The intersection of 13th Street and J Street in downtown Sacramento is a mess for walkers and bicyclists, largely due to poor decisions that the city has made. The setting is below, with a historical view selected for no leaves on the deciduous trees. On the southeast corner is the convention center, which is under construction now, and the southeast corner is fenced off. On the southwest corner is the Sheraton Grand Hotel. On the northwest corner is a major downtown parking garage, managed by Ace Parking. On the northeast corner is another parking garage managed by Parking.com.
In the days before construction on the convention center started and the Sheraton shut down due to the pandemic, this was one of the busiest pedestrian intersections in the central city. The crossing of 7th Street at K Street/DOCO Center, L Street at 11th Street and 10th Street when the legislature is in session, Capitol Mall at Tower Bridge, and a few others are up there, but this one is certainly in the top 10. The city rarely collects pedestrian data, so I do not know what the ranking or volume is.
When the convention center is completed and open, and the Sheraton opens at full scale, this will again become a very busy pedestrian intersection. So you would think that the city would design this intersection and signals to prioritize people walking, but you’d be wrong.
The crossing of J Street on the west leg of the intersection requires pushing the ped button. There are a number of pedestrian signals in the central city that do not require pushing the button, and these are called auto-recall, meaning they automatically change on a cycle. Not this one! I just observed a number of walkers crossing here, and only about 5% of them initially realized they had to push the button. When I mentioned that the signal would never change unless they pushed it, they were surprised, and not happy. When the ped head signal does come on, it has a white hand of 5 seconds, and a countdown of 9 seconds for a total of 14 seconds. There are three lanes of motor vehicle traffic here, lanes about 12 feet wide, for 36 feet. The MUTCD recommended crossing speed is 3.5 feet/second, so 36 feet should be a minimum of 10 seconds, but this assumes that people can leave the curb immediately, not true when the activation button is set well back, and there is pedestrian congestion. In that case, the crossing speed should be 3.0 feet/second. If you want to read about the contortions traffic engineers go through to make walk cycles as short as possible, read pedestrian crossing questions and answers.
The traffic signal for J Street will remain green unless there is a vehicle waiting on 13th Street or someone pushes the ped button to cross. The ped signal to cross 13th Street goes through a white hand, countdown, brief pause, and then back to the next cycle. Without a cross-traffic vehicle or button push, the traffic signal will never cycle. Ever.
An additional problem is that sometimes the signal controller will just skip the crossing J Street part of the cycle, even when the button is pushed. Since I’m mostly on my bicycle rather than on foot here, I haven’t quite pinned down the behavior. I don’t know if it depends on time of day, or traffic volume, or is just random, but I can affirm that it happens, and not infrequently. So even after the walker presses the button, they may have to wait through another full cycle before they get the walk.
On the southeast corner, the convention center construction has closed the corner and sidewalks. In this situation, there should be a barricade and warning signs on the opposite corner, so J Street south side eastbound and 13th Street east side southbound. A fully sighted person can of course see the barrier and fence across the street, but the point of ADA requirements is to communicate to everyone, not just the sighted. Below is what is looks like, followed by what it should look like. Remember, this is a city project, not a private development, but the city apparently holds itself to lower standards than it holds private developers.
The east leg crosswalk also suffers from traffic flow design. The walk sign for this crosswalk comes on at the same time as the southbound green signal comes on, bringing drivers into immediate conflict with walkers in the crosswalk. There is no leading pedestrian interval (LPI) to let the walkers get a head start. At this time the crosswalk is closed, but as soon as it is reopened, the conflicts will be immediate, as they have been for years.
Immediately institute auto-recall on the crossing of J Street, and remove the buttons. These are not modern audible buttons, they are antiques.
Immediately institute a leading pedestrian interval on the crossing of J Street, to increase protection from left and right turning drivers.
Immediately lengthen the pedestrian phase for the crossing of J Street to a minimum of 20 seconds.
When then southeast corner of the intersection is re-opened, with completion of the convention center construction, implement an exclusive pedestrian phase for this intersection, in which there is no movement by motor vehicles during the walk cycle, and walkers can cross in any direction including diagonally. If any intersection in Sacramento deserves this treatment, this is it.
Traffic calm J Street to reduce speeds. The most important step is to reduce general purpose lanes to two, and create some sort of bicycle facility. I’m not sure of the best design, as the valet/unloading/loading are for Sheraton Grand may make this challenging.
Get rid of any City of Sacramento Public Works employee who believes the purpose of central city streets is to favor suburban commuters (the J Street traffic) over walkers, bicyclist, and local residents.
I have made at least seven 311 reports on the signal problems at this intersection, asking that it be changed. The only change that I’ve been able to notice is that they lengthened the pedestrian phase for crossing 13th Street, and shortened it for crossing J Street. I just gave up after a while.
That covers most of the pedestrian problems at this intersection. How about bicyclists? 13th Street is a major bicycle route in downtown, being the only north-south street that crosses through Capitol Park and is not an arterial street, often with heavy traffic and higher speeds. There are bike lanes on much though not all of 13th Street to the south J Street, and there are bike lanes on most blocks to the north, except the half block approaching this intersection. Here, the bike lane has been sacrificed to create a turn lane. There is a required left turn lane and an optional turn lane, but no bike lane. So at this busiest of all intersections on the route, there is no bike lane. There is a clear message here from the city: we will accommodate bicyclists only if it does not reduce motor vehicle capacity. Otherwise, tough luck.
The loop detectors on 13th Street only sometimes detect bicycles. I often see bicyclists during off-times, when there are fewer motor vehicles to trigger the cycle, proceeding through the intersection on red, when it is safe to do so (and occasionally when it is not). They have the right to do so, since by definition a signal that does not detect vehicles (devices) is a non-functional signal, but it is not the best solution.
When the pedestrian button is pushed to cross J Street on the west leg, but no southbound motor vehicles are present, the vehicle signal remains red, so doesn’t allow for undetected bicyclists. This doesn’t protect any walkers, so it makes not sense.
Continue the bike lane on southbound 13th Street to and through (with green skip paint) the intersection with J Street, and remove the left turn lane which prevents the bike lane from continuing. That might mean lengthening the green light for motor vehicles in order to clear the queue.
Install video detection on this intersection that will detect bicyclists on 13th Street so that they don’t have to wait for motor vehicle traffic to arrive and trigger the signal cycle.
Change the traffic signal for southbound to go green at the same time as the pedestrian walk sign. This allows bicyclists to proceed without confusion.
I wrote some while ago about leading pedestrian indicator (LPI) signals, which give the pedestrian a head start of a few seconds before the parallel traffic light turns green. So far as I know, Sacramento has not added any locations to the list of eleven.
But the city should. In fact, I’d argue that any traffic signal where there are a significant number of walkers, and a significant number of turning drivers, should have an LPI. Drivers often fail to yield to people in the crosswalk when turning, or cut in right behind them, and the more chance the walker has to get out into the crosswalk and visible, the better. Of course nothing about the LPI prevents the driver from turning on red, unless turns on red are prohibited. Prohibiting turns on red has been much discussed lately, but I don’t think that treatment is the most important that can happen at intersections.
I live a few blocks from Fremont Park, which is the block between 15th Street and 16th Street, and P Street and Q Street. In fact, many of the parks in the central city are located between pairs of one-way streets, called couplets. 16th is one of the busiest streets in the central city, and the other two are moderately busy, and these four intersections see a lot of turning vehicles. Since I walk nearly every day to and around the park, I get plenty of chance to see how drivers interact with walkers in the crosswalk. I’ve never seen anybody hit, but I often see conflicts, the driver trying to intimidate the walker, trying to beat them to the crosswalk, stopping just short of hitting them, or cutting in close behind them.
P Street and Q Street are two-lane arterials, while 15th Street and 16th Street are three-lane arterials, with higher traffic volumes and vehicle speeds. 16th was a state highway.
So, I’m asking the city to install LPI signals for the south crosswalk at 15th & P, the east crosswalk at 15th & Q, the north crosswalk at 16th & Q, and the west crosswalk at 16th & P. The photos below show the intersection of 15th & P from pedestrian level, and overhead. The video shows two pedestrians crossing, and mostly through the crosswalk before the driver encroaches. This was a low traffic time with only one turning vehicle. When I have a chance to capture a heavier traffic time with pedestrians, I’ll replace it.
I often write about the Sacramento central city because that is where I live, and I have ample opportunity to observe transportation infrastructure and driver, walker and bicyclist behavior. However, I’d like to state that I DO NOT think that central city issues should be solved first. These issues occur in many places in Sacramento, where the traffic is higher speed, facilities are poorer, and neighborhoods have been disinvested. Drivers in the central city are just as bad as drivers elsewhere, in fact most of them are from elsewhere, the suburbs, but they have grown somewhat accustomed to seeing walkers and bicyclists, and are more careful around them.
The section of 9th Street in Sacramento, between K Street and L Street, finally has an acceptable walking and bicycling pathway around the construction on both sides of the street. It looks as though the construction on the west side of 9th is getting closers to completion, so the sidewalk blockage on that side may disappear, but the east side construction is just beginning.
The pathway is about 12 feet wide, as originally promised, so that is taken care of. There are cones down the middle, the purpose of which I’m not clear about since there is no indication of directional or mode separation, but they do no harm. The signing and barricades on both the north side and south side are still lacking, the barricades not meeting ADA detectability requirements, and the signing less than ideal.
Two days ago the fencing had been pushed out into the pathway area. I’m not sure if this was a one-time occurrence, or will keep happening. The next day it was back in the right place.
After my moving the cone out of the bikeway on the approach at K Street several times, it seems to be staying out of the way.
This safe pathway for walkers and bicyclists is the direct result of citizen complaints, mine and several others. If not for these complaints, the city and the construction contractor would not have done anything. So, please report violations of ADA accommodation through the city’s 311 system, and if that doesn’t result in change, complain to your city council member. Though the city is working on new policy intended to address these failures, I suspect that indifference is so embedded in city staff that it will take a long while to see proactive solutions, and we will need to continue to report and complain for some while.
Edit: Added graphics for El Camino – Grove intersection and Broadway – Stockton intersection, excerpted from the Sacramento Vision Zero Top 5 Corridors document.
The Sacramento city council will be considering the new Sacramento Vision Zero Top 5 Corridors document at the council meeting on Tuesday, February 15. It is item 11 on the consent agenda, so will not be discussed unless a council member pulls it from the consent agenda.
I have taken a look at the document, though the one included with the with the agenda is a flat file, not searchable, and with low resolution graphics, making it hard to use. When a high resolution and searchable version becomes available, I’ll link to it.
The document continues the pattern established in the 2018 Vision Zero Action Plan of focusing on corridors and not on intersections. The five segments presented as the top five are segments of El Camino Avenue, Marysville Road, Broadway/Stockton Blvd, Stockton Blvd south, and Florin Road. I believe that this exclusive focus on corridors is a mistake. Nearly all other vision zero communities have a dual focus on corridors and intersections, but Sacramento does not.
The Vision Zero Action Plan acknowledges on page 11 that 78% of collisions occur at intersections, but then seems to ignore this fact in pursuit of corridor projects. Of course if a corridor is done correctly, the intersections will be fixed as part of the project. The issue is that these corridor projects will cost millions of dollars and will require seeking state and federal grants to accomplish. The costs are El Camino $16,450,000, Marysville $12,850,000, Broadway/Stockton $8,750,000, Stockton South $9,500,000, and Florin $11,900,000. And these are only for the most important fixes; less important or more expensive fixes are somewhere off in the distant future. But a focus on the high injury intersections within the corridor could yield significant safety benefit at much lower cost, perhaps within the range of general fund expenditures.
This focus on corridors leads to some flaws in the corridor plans. On El Camino, the plan misses that there is a dropped bike lane at eastbound at Grove Avenue and therefore does not recommend the countermeasure Extend Bike Lane to Intersection. At the Broadway/Stockton intersection, the plan does not recommend the countermeasure Bike Conflict Zone Markings for Broadway eastbound and westbound approaching Stockton, and seems to completely drop the bike lane on Stockton northbound approaching, even though a bike lane is already present there.
Re-striping of lanes at intersections and green paint could make many intersections a great deal safer without requiring expensive intersection reconstruction and new signals. I recently wrote about Dropped bike lanes, using Broadway/Stockton as an example. Paint could fix a lot of the problems here.
The concerns expressed here are with bicycle facilities. I actually think pedestrian (walker) facilities are more important, but it will take a lot more time to look closely at those.
The bicycle-related countermeasures recommended in the Vision Zero Top 5 Corridors are:
Bike Conflict Zone Markings: Green pavement within a bike lane to increase visibility of bicyclists and to reinforce bike priority. The green pavement is used as a spot treatment in conflict areas such as driveways.
Class II Bike Lanes: Five to seven foot wide designated lanes for ‘bicyclists adjacent to vehicle travel lanes, delineated with pavement markings.
Close Bike Lane Gap: Closing gaps between bike lanes increases the amount of dedicated facilities bicyclists can use, reducing mixing of bicyclists and drivers and Increasing network connectivity and visibility of bicyclists m the roadway.
Extend Bike Lane to Intersection: In locations where a bike lane is dropped due to the addition of a right tum pocket the intersection approach may be re-striped to allow for bicyclists to move to the left side of right-turning vehicles ahead of reaching the intersection.
Provide Green Time For Bikes: Provide or prolong the green phase when bicyclists are present to provide additional time for bicyclist to clear the intersection. Can occur automatically in the signal phasing or when prompted with bike detection. Topography should be considered in clearance time.
Remove Right Turn Slip Lane: Closing a free-flow right-turn slip lane can help slow right turning drivers, eliminates an uncontrolled crossing for pedestrians, and shortens pedestrian crossing distances. The space reclaimed in closing the slip lane can be reused as pedestrian widen sidewalks, enhance curb ramps, more space for street furniture.
Separated/Buffered Bikeway: Designated bike lanes, separated from vehicle traffic by a physical barrier usually bollards, landscaping, or parked cars. These facilities can increase safety by decreasing opportunities for crashing with overtaking vehicles, and reducing the risk of dooring.
Slow Green Wave: A series of traffic signals, coordinated to allow for slower vehicle travel speeds through several intersections along a corridor. Coordinating signals for slower travel speeds gives bicyclists and pedestrians mare time to cross safely and encourages drivers to travel at slower speeds.
I support the Vision Zero concept and city actions to support this, but I want to make sure that both are the best they can be. I hope to look in the near future at the pedestrian elements of the Vision Zero Top 5 Corridors, the Vision Zero School Safety Study, and the high-injury intersections in Sacramento that have been missed through a focus on corridors.
I went by the Slow & Active Streets again today. Ali Doerr Westbrook and Katie Valenzuela had a table set up on 26th Street at K Street to inform the public, and giving out Valentine’s goodie and bike network maps.
Since Friday, the signs have been moved out into the street, rather than on the side. I spent some time watching traffic, and this placement does seem more effective. I saw people starting to turn onto the routes and then not, and also drivers going less than a block to homes.
An unexpected feature was that the traffic signals on 26th Street had been set to flashing red along 26th and the cross streets. I was surprised because it is rare that the city changes traffic signal operations for anything.
I heard from people that the street had been very active yesterday on a warm sunny day, but there weren’t a lot of people out today. More bicyclists than walkers. Everyone seems very happy to see this program in effect.
One driver stopped while I was taking a photo, to ask what I thought. He then mentioned that he lived on O Street, and was very happy to see this traffic calming, as he said many drivers went way to fast on O Street, coming off 21st Street (which is a one-way street with higher traffic speeds even though posted 25 mph).
The City of Sacramento implemented the first three Slow & Active Streets on Friday. Eleven blocks of 26th Street, four blocks of O Street, and five blocks of V Street were designated. Apparently these streets were selected based on strong support from the Midtown Neighborhood Association.
These streets are not closed to motor vehicles, this is not an open street type designation, but through traffic is discouraged. The signing below is on 26th Street at S Street, and every block is marked with signing, though some blocks are simpler. The signing is always set to the side, in what would be the parking lane. This is different from the setup used by almost all other cities that have set up slow streets, where drivers have to carefully go into the opposing lane in order to proceed on the street. The signs are less likely to be damaged, which is a problem in some cities where belligerent drivers move or simply run over the signs, and where errant drivers cannot help but hit anything in the roadway, no matter the safety colors used. But they are also less likely to be noticed.
I watched two intersections on 26th Street for some while, and I saw not a single driver avoiding continuing on or turning onto 26th Street because of the signing. This may change over time as people get used to it, or it may not. It is, after all, a pilot. If you walk or bicycle on these Slow & Active Streets, or live on them, please let the city know what you think and what you observe, at https://forms.cityofsacramento.org/f/PW_Transportation_CommentForm.
The city has said the Slow & Active Streets program will be in effect at least through the end of April, but that may be extended to the end of June. Some additional streets are under consideration. The city has said that primary limiting factor for the pilot is the requirement that the signing be checked every day by Public Works staff, and after April these staff will be busy with other tasks. I am sure that local resident can take care of most needs, and report to the city if there is something they cannot fix, but I don’t see a need for staff to check them any more than once a week.