This is a follow-on to my 2016 post back to the old ways? Since that time I have watched several streets in downtown being torn up for utilities. Under the asphalt pavement on several of them are cobblestone and brick streets, covered over by asphalt to provide a smooth and fast ride for car drivers, and a less safe street for everyone. There are also a number of streetcar tracks that have similarly been buried beneath asphalt. Car drivers have won the battle for our streets, so far, but the trend is starting to reverse, even in Sacramento. The City of Sacramento, in its new general plan, has decided that walkers are more important than drivers!

The Strong SacTown street design standards team has identified four roadway typologies, Local Streets, Active Streets, Transit Streets, and Roads. Every redesign of Local Streets should consider installing rougher pavement to slow motor vehicles. Of course if a street is used by bicyclists, the pavement can be only moderately rough, not like the cobblestone pavement on Front Street in Old Sacramento Waterfront. Sidewalk level bike lanes, separated from the roadway and smooth, solve this for some kinds of streets, but local streets usually will not have bicycle facilities because they are low speed and low volume safer streets.

Rough pavement slows drivers, not just where there are traffic calming features such as curb extensions and chicanes, but for the entire block. Rough cobblestones like Front Street limit motor vehicle speeds to 10-15 mph, but a moderately rough street can enforce 20 mph or less, which is the goal for all local streets.

Brick streets do cost more to install than asphalt (the cheapest, in both senses of the word) and concrete streets. But they last much longer, according to The Planning Lady: It Pays to Save Your Brick Streets. “A concrete street will be replaced 3 times and asphalt 6 times over that time period.” Brick laying machines, originally invented in the Netherlands (of course), but now available from many companies, reduce the cost of creating brick streets considerably. I don’t know the range of brick roughness that can be laid by machine, but it should be sufficient for moderately rough streets. The roughness of historical cobblestone like Front Street might not be affordable today, with the material harder to source and labor more expensive, but many cities are using cobblestone for slow streets and gateway treatments.

Photos below of Clay Street in San Francisco cobblestone, Front Street in Sacramento cobblestone, and Liestal Alley in Sacramento brick.