traffic counts

National Bike Month in May results in an inevitable flurry of national press articles trumpeting bike commuting. The headlines can get pretty repetitive: "Top 10 Cities for Bicycling," "Bike To Work Rate Grows," "City Adds 10 More Miles of Bike Lanes."

It's hard to make the case for public spending on biking and walking without hard data. And quality data has been hard to come by. The Rails-to-Trails Conservancy is looking to change that. The group has taken on a new project to rigorously measure walking and biking on various corridors, providing baseline data that can help make the case for active transportation projects.

To reach Mayor Rahm Emanuel's goal of having five percent of trips under five miles made by bike, bicycling will have to appeal to a much broader base of people than it does today. CDOT's bikeway projects will only succeed at that goal if new cyclists feel safe and comfortable while riding in these lanes -- which, in turn, largely depends on whether they feel safe from nearby traffic.

Crews will be demolishing a viaduct over Western Avenue this weekend as part of Bloomingdale Trail construction, necessitating the closure of Western and diverting automobile traffic and CTA buses to Damen and California, each a half mile away. People walking or biking will be rerouted to the underpasses a block away on either side.

This is the edited text of a speech I gave Monday night for the City of Chicago's Earth Data Celebration about the use of data in measuring sustainability performance measures in Chicago.