Make Cities Slow Again

Bad urban design makes for poor living conditions and when cars are involved it can mean lethal conditions. As people know all to well, the last century’s bizarre love of the automobile has given us a lot of issues that we need to deal with today. Some solutions are really complex (like climate change) while others can be solved easily through simple design tweaks. One fast and easy way to save lives is to lower the speed limits on cars. Another simple solution is to stop designing our streets to allow cars to travel at high speeds. Cars kill, but it doesn’t have to be that way.

Many people fear that slowing the speed limit in urban areas will dramatically increase journey time. However, average road speeds in cities are more determined by the frequency of intersections than speed limits.
A safer speed limit can achieve more uniform speeds and reduce dangerous midblock acceleration, while adding little to overall journey times. Research from Grenoble, France has shown that a speed limit of 30 kmph (18.64 mph) rather than 50 kmph (31 mph) only added 18 seconds of travel time between intersections 1 km (.62 miles) apart. Lower speed limits may even reduce congestion in some cases, as they reduce the likelihood of bottlenecks. This has been observed in Sao Paulo, where lowering the speed limit on major arterials reduced congestion by 10 percent during the first month of implementation, while fatalities also dropped significantly.

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