When Mayor Bloomberg announced that the new pedestrian spaces in Midtown are here to stay,
he made special note of the safety improvements on Broadway, which he
called "reason enough to make this permanent." And after the mayor told
reporters that the city was getting lots of requests for similar
livable streets treatments, the speculation started: What’s next?
To
replicate the Midtown street safety benefits throughout the five
boroughs, New York could look to the example of the UK, where 20 mph
zones have reduced automobile speeds across the country. The global
city that perhaps most closely resembles NYC — London — has been
installing 20 mph zones for the last decade, and they are saving lives.
Already, 27 fewer Londoners are killed or seriously injured each year because of them.
The
standard speed limit in London, as in New York, is 30 mph. Since 2001,
however, London has built more than four hundred 20 mph zones, as
described in a 2009 report by the London Assembly [PDF]. The
zones are located in residential neighborhoods or near areas of high
pedestrian activity, like schools. As of last year, they covered 11
percent of the total road length of the city.
The safety
effects of the 20 mph zones have been enormous for pedestrians,
cyclists, and drivers alike. In London, serious traffic injuries and
fatalities have fallen by 46 percent within the zones, according to the
prestigious British Medical Journal.
Deaths and serious injuries sustained by children have dropped 50
percent. There’s even a small spillover effect, with areas immediately
adjacent to 20 mph zones seeing an eight percent reduction in total
injuries and deaths. The science is so clear that in 2004 the World Health Organization endorsed 20 mph speeds as an essential strategy to save lives.
These
20 mph zones do much more than change a digit on speed limit signs.
London’s zones include a host of traffic calming measures to make the
speed limit self-enforcing: road humps, raised junctions, chicanes, and
raised crosswalks are the most common. Increasingly, speed cameras are
used to enforce lower speeds.
When paired with hard hitting public service announcements like these,
London is addressing each of the three E’s of traffic safety:
engineering, enforcement, and education. As a result, the 20 mph zones
really work, silencing skeptics who claimed that Londoners would just
keep driving as they always had. As implemented, overall speeds in
London’s 20 mph zones have decreased by nine miles per hour, according
to the London Assembly report. Transport for London recently
recommended
880 more sites for the traffic-slowing treatment.
Read more…