Two D.C. councilmembers are proposing that the speed limit on residential streets in the District be lowered from 25 miles per hour to 15 miles per hour.

The plan would make the streets safer for pedestrians and cyclists, while adding only a minute or two of travel time to most trips, advocates say.

Critics say such low speeds would be hard for motorists to maintain, would add to the District’s traffic woes and could actually increase incidents of aggressive driving and road rage.

Arlington has been especially conscientious when it comes to ‘traffic calming’ projects in residential neighborhoods. Should the county ask Virginia (a Dillon Rule state) to allow localities to post lower residential speed limits?