A ramp at one of the major Capital Beltway interchanges in Virginia is scheduled to close overnight for work on the high-occupancy toll lanes project.

At the Springfield interchange, the Virginia Department of Transportation plans to close the exit from the inner loop to southbound Interstate 95 — the Richmond-bound side — from 9 o’clock tonight to 5 a.m. Wednesday.

The schedule calls for closing the left lane on the exit ramp at 9 p.m. After midnight, all access to the ramp will be blocked. Traffic bound for southbound I-95 will be detoured to Exit 170B onto northbound I-395 . Drivers will then take Exit 2B for Edsall Road, and follow signs back to I-95. Using the detour is likely to add 15 to 20 minutes in driving time.

Also at midnight, a left lane on the inner loop before the interchange will be closed, and sometime later, workers will close all the inner loop lanes for up to 30 minutes while they install the structure for an overhead sign.

VDOT says drivers should expect delays during all this work and consider alternative routes.

VDOT and Transurban, the company that will operate the HOT lanes, now refer to them as the 495 Express Lanes. Officials hope to get drivers used to that term, because when the lanes open late this year, the highway signs will say “Express Lanes.” That complies with Federal Highway Administration rules on signs.