U.S. Federal Route 40 runs east-west across Washington County. This follows the Interstate 70 and Interstate 68 corridors. U.S. Rt. 40 passes through the following towns in Washington County. Wagners Crossroads Hagerstown Cedar Lawn Huyett Wilson Clear Spring Indian Springs U.S. Rt. 40 is multi-plexed in Washington County. Interstate 70, from near Indian Springs, to near Hancock.
Interstate 68, from near Hancock to the Allegany/Washington County Line.
Branches of U.S. Rt. 40 in Washington County. A BGS on WB I-70. A BGS on NB I-81. A BGS on SB I-81. A BGS on SB I-81. WB I-70/U.S. Rt. 40 east of MD St Rt 615. WB I-70/U.S. Rt. 40 east of MD St Rt 144. WB I-70/U.S. Rt. 40 east of Hancock. EB I-70/U.S. Rt. 40 at MD St Rt 144. EB I-70/U.S. Rt. 40 west of MD St Rt 144. WB I-70/U.S. Rt. 40 at MD St Rt 144. WB I-70/U.S. Rt. 40 east of U.S. Rt. 522. WB I-70/U.S. Rt. 40 east of U.S. Rt. 522. WB I-70/U.S. Rt. 40 east of south U.S. Rt. 522. WB I-70/U.S. Rt. 40 at south U.S. Rt. 522. WB I-70/U.S. Rt. 40 near U.S. Rt. 522. A BGS on NB U.S. Rt. 522. A BGS on NB U.S. Rt. 522. A BGS on WB I-70/U.S. Rt. 40; NB U.S. Rt. 522. A BGS on EB I-70/SB U.S. Rt. 522. WB I-70/U.S. Rt. 40; NB U.S. Rt. 522. WB I-68/U.S. Rt. 40 east of I-70/U.S. Rt. 522. WB I-68/U.S. Rt. 40 west of I-70/U.S. Rt. 522. WB I-68/U.S. Rt. 40 near Harvey. WB I-68/U.S. Rt. 40 near Scenic U.S. Rt. 40/MD St Rt 144. WB I-68/U.S. Rt. 40/Scenic U.S. Rt. 40 east of Sideling Hill. WB I-68/U.S. Rt. 40/Scenic U.S. Rt. 40 at Sideling Hill. WB I-68/U.S. Rt. 40/Scenic U.S. Rt. 40 west of Sideling Hill. WB I-68/U.S. Rt. 40/Scenic U.S. Rt. 40 near the Allegany/Washington County Line.