Phillip Barron
Just two weeks ago, Main Street was one-way through downtown Durham. City officials closed the street Saturday and reopened it for traffic going in both directions. How do drivers know the difference?
City leaders ceremoniously proclaimed its transformation from the stage at Durham Rising, the party celebrating downtown’s rebirth. Several newspaper articles and TV news broadcasts have mentioned it. Maps of downtown Durham will be redrawn at some point. But many people will simply discover that Main Street is now a two-way street when they drive downtown and see the fresh yellow double line separating the lanes.
Lines on the road serve a purpose.
The yellow and white strips of reflective paint that city and state governments use on asphalt help to guide traffic. Drivers respond well to these guidelines, and that’s exactly why there are lanes to facilitate the safe flow of traffic. We live (and drive) in an era when competition for drivers’ attention revolves around anything but keeping the driver’s eyes on the road. Cell phones, iPods, DVD players, and even video games have found a home inside automobiles. Lanes assist drivers whose attention may be split between Gnarls Barkley on the radio, Mortal Kombat in the back seat, a dentist on the other end of the phone and traffic.
Bike lanes do the same thing for drivers and cyclists that other lanes do. They guide all vehicles into predictable places on the road so that each person can safely go where she or he needs to go. The Pedestrian and Bicycling Information Center at UNC-Chapel Hill defines bike lanes as “a portion of the roadway which has been designated by striping , signing and pavement marking for the preferential or exclusive use by bicyclists.”
By carving out a dedicated space on the road for bicycles, bike lanes remind drivers that they share the road with all different kinds of vehicles. As Nancy Gallman of Durham put it, “bike lanes create the expectation that bikes will be on the road, even if they aren’t there right now.” They train drivers to expect cyclists, and they welcome cyclists onto the road.
Bike lanes are critical for creating a bike-friendly community in one more way — they calm traffic. A typical outer lane is 14-feet wide. A 14-foot outer lane looks pretty wide, and traffic engineers know that drivers speed on wide roads. A 10-foot outer lane, however, looks a lot more narrow, and drivers naturally (if not subconsciously) drive more slowly. It simply requires more concentration to keep your car in your lane if your lane is narrow.
We can reduce outer-lane width to ten feet by using the remaining four feet for a bike lane. The American Association of State Highway and Transportation Officials sets their minimum bike lane width at four feet. Those four feet have to be asphalt — the bike lane can’t push cyclists into the gutter. Nor would a well-designed bike lane be painted next to parked cars where cyclists would be forced to ride in the “door zone”.
Granted, there are many examples of poorly designed bike lanes, some of which make riding more dangerous for cyclists than it would be without a bike lane. Just look at Duke University’s Campus Drive bike lane for a local example. But poorly designed bike lanes are unsafe because they are poorly designed.
Further, cyclists are permitted full use of the road in North Carolina. If the bike lane is unsafe — because of gravel, pot holes, or any other reason — then cyclists are free to move out of it. Cyclists, like drivers, are expected to choose the safest means of travel.
Well-designed bike lanes foster safe riding; they do this best when bike lanes are part of a larger network of safe roads and greenways. Durham’s new bike plan is a master plan for how Durham can use bike lanes safely and effectively. When designing them, let’s make sure they go somewhere and they are safe, because cyclists are likely to use bike lanes when they connect to neighborhoods, workplaces, and recreation centers.
As a recent Herald-Sun editorial noted, Durham will see more cyclists hit the streets as gas prices continue to rise. The most important thing the city and county can do to foster Durham’s growing bike community is to adopt design standards that take cyclists into consideration when designing and maintaining all roads.
This piece ran as an Op-Ed in the Sunday edition of The Herald Sun, July 8th, 2007.
