Passing thru Arlington I noticed that many routes dont have a whole lot of reassurance markers... barely any signs on 29 & 50 to indicate it as such and its even worse on the state highways esp. 237 & 244. I think 120 isnt too bad but I bet its sparsely signed north of 66.
Even the part of 237 west of Arlington is unevenly signed. 244 in Arlington seemed destined to be decommissioned (except at the VA 27 and VA 120 intersections) so local streetcar lines could run on Columbia Pike, but the streetcar project was canceled. There at least is 244 reassurance signage at the VA 27 and VA 120 intersections.
As for US 50, it's really hard to unintentionally stray from the route between Seven Corners in Fairfax County and the Rosslyn area of Arlington (which has decent US 50 signage). No need to post more US 50 markers along the highway.
US 29 once got a little confusing between VA 120 and Quincy Street, where US 29 was called Old Dominion Dr., and Lee Highway veered off the main road for about 0.6 mile. Now all of US 29 in Arlington County has been renamed to (and well-signed as) Langston Blvd., and the part of Lee Hwy that wasn't part of US 29 is now Cherry Hill Rd. Now US 29 is about as easy to follow in Arlington County as US 50, even with limited reassurance signage.
BTW, I don't place a high priority on reassurance signage, except where needed to keep travelers from getting lost. Then again, one of my favorite highways has at least two 100+ mile gaps in its route signage, without anybody getting lost on the region's only highway.
I dont even know why 237 exists and its super confusing that theres a ton of signs for it off I-66 Exit 69. Not a single sign on Washington Blvd to indicate that it is 237. The concurrency with 29 also missing
The
Virginia Highways Project page discussing 237 (and other routes) agrees: "VA 237's posted routing largely makes no sense." It might've made more sense before the roughly parallel I-66 was punched through Arlington in the early 1980s.
As the VHP item notes, much of 237 east of VA 120 was turned over to Arlington County in 2018. There still is some remnant signage on the relinquished part of Fairfax Drive.