The nearest speed-limit sign is half a mile before this trap. The road seems much like Arlington Blvd (VA Hwy 50)- it has two lanes each direction and a wide median as well. Unlike Arlington however, whose limit is 45, the limit here is 35. Many people make the mistake I did- in my rear-view mirror I saw the officer pulling over another car within seconds as I pulled away. But beware- I checked today, a few weeks later, and an officer was at the same trap right around noon, so the danger is not limited to rush hour. By the way, someone else posted a note in 2005 about a trap at N. Glebe and 21st. That is only 2.3 miles from this one. My guess would be that this mobile tax collection unit has just relocated, and will probably do so again when the party here is over. They could respond reasonably by posting a few more speed limit signs in the stretch I traveled but no, that would spoil the fun, wouldn’t it?