Washougal leaders may not have realized it, but with one simple vote — to reduce speed limits on the city’s downtown Main Street to 20 mph — they joined a growing global movement to make urban areas safer, healthier and greener.
This push for “20 is plenty” didn’t start in nearby Portland or Seattle, both of which have taken the movement to heart, recently decreasing speeds on residential streets. Rather, it began in 2007, in the United Kingdom (UK), with a nonprofit called “20’s Plenty For Us” that wanted to help community leaders make their streets more liveable.
Researchers found that reducing speeds to 20 mph on streets used by drivers, pedestrians, cyclists and even horse riders in some parts of the UK, reduced injuries by 20 percent and gave non-drivers a seven to 10 times greater chance of surviving being hit by a car. Portland’s Vision Zero campaign used a 2013 study showing that a pedestrian hit by a driver traveling at 25 mph is two times more likely to die compared to a pedestrian hit by a driver going just 5 mph slower at 20 mph.
The lower speed limits also have some impressive environmental benefits: When Germany introduced the program, it found that traffic ran smoother, drivers braked less and used less fuel. Researchers estimated that, thanks to the lower speed limit, emissions in residential areas decreased by about 12 percent.
Plus, the slower cars made walking and biking more attractive. According to the “20’s Plenty” organization, the city of Bristol found that walking increased by 23 percent and cycling by more than 20 percent after implementing the new 20 mph speed limits.