The jersey barrier may have become the ubiquitous security feature of post-9/11 Washington, but it may soon be supplanted by another roadblock of choice: the Metrobus. On July 4, in lieu of more traditional choices, U.S. Park Police used several buses to block Constitution Avenue NW from traffic entering the city from Interstate 66. A spokesperson for the Washington Metropolitan Area Transit Authority says the agency deployed more than 60 buses to law-enforcement agencies for the holiday. (The buses were reserves, so the roadblocks didn’t affect bus service, says Metro Assistant General Superintendent James A. Strader.) Park Police Sgt. Scott Fear says his department has used the bus as its barricade of choice for two years now. “They can provide a hard barrier you can move easily if you need to get people out quickly,” he says. —Mike DeBonis