CommuterPageBlog has more information about Arlington's trail counting technology and the results. The spike is Bike to Work Day and the lowest days all coincide with bad weather.
For the month of May there were 40,499 bicycle trips past this section of the Custis Trail and 13,322 pedestrian trips.
I can't wait to see year to year data. But then, I'm something of a nerd.
There's also a link to a USA Today story about the sensors.
The increased use of high-tech sensors supplements a push for expanded counts by the National Bicycle and Pedestrian Documentation Project, which this September is overseeing censuses in about 150 cities, including Kansas City, San Francisco and New York City, Michael Jones says.
Jones, a planner and principal with the Portland, Ore.-based Alta Planning and Design, says he founded the count in 2004 after growing frustrated by the lack of consistently collected pedestrian and bicycle use data. He says about 10 groups conducted counts that first year.
Under the project's census, trained volunteers record the direction of each passing biker and pedestrian for two hours each on a weekday and weekend day in multiple locations, and then use around-the-clock tallies from automated devices placed on other nearby trails and roads to account for seasonal and daily weather variations, Jones says. He says it's easy to find volunteers to monitor riders on sunny days, but hard to find people willing to stand in the rain at night, even though cyclists are still out.
"It's a great relief to have robots out there counting … rain or shine," Patton says