DC-Maryland-Virginia D74 Detour Adapts to Infrastructure Work

D74 bus detours around Connecticut Avenue Underpass construction since September 23

2026-02-01, Moovit News Team

D74 Bus Detours Around Connecticut Ave Work

DC's D74 bus route is running on a detour around Connecticut Avenue Underpass construction, affecting commuters across the District, Maryland, and Virginia. WMATA implemented the temporary route change September 23 to accommodate a District Department of Transportation infrastructure project. Officials haven't said how many riders use the D74 daily or provided ridership impact estimates.

Construction Forces Service Modification

The detour stems from DDOT construction work on the Connecticut Avenue Underpass Lanes, a key corridor connecting neighborhoods in Northwest DC. Transit agencies typically reroute buses when roadwork blocks regular paths, though the duration of such detours varies based on project scope. WMATA classified this as a high-severity disruption, indicating significant route changes or delays. Officials didn't specify which streets the detour uses or how much additional travel time riders should expect.
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Scope and Duration Details Limited

WMATA announced the service change in late September but didn't provide a timeline for when the detour will end. The duration depends on DDOT's construction schedule for the underpass project, though specific completion dates weren't available. Transit officials said the detour will remain in place until infrastructure work is finished. The agency hasn't released details about whether other routes face similar disruptions from the same construction project or if additional service modifications are planned.

Implementation Underway Since Late September

The detour took effect September 23, with WMATA directing riders to check for updates before traveling. Officials said they're monitoring the situation but didn't specify how frequently they'll reassess the route or provide progress updates. The agency typically posts service alerts on its website when construction-related detours are active, though whether printed notices appear at affected stops wasn't confirmed.
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Riders Should Plan Extra Time

Commuters using the D74 should expect longer travel times and different stop locations while the detour remains active. Officials recommend checking current route information before trips, though they didn't specify alternative routes for riders who want to avoid the affected area. Moovit provides real-time updates for WMATA routes, including detour information and adjusted arrival times for the D74 and other buses affected by construction projects.