Before you leave, check the responsible transportation agency’s latest notice for the road or bridge, then recheck near departure. If a road is closed, use the signed detour—not the closed route—and follow the traffic control at the work zone. Because schedules and traffic patterns can change, plan an alternate and keep your arrival time flexible.
Check the official notice before you travel
Search the state department of transportation (DOT), county, or city transportation website for the road or bridge name and terms such as “construction,” “closure,” and “detour.” Look for the dates and time windows, the affected direction or lanes, and whether all traffic is prohibited or only certain movements. FHWA guidance recommends advance information about work-zone dates and closures, along with detour signs and changeable message signs to communicate conditions (FHWA guidance on transportation management plans for work zones).
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Use the agency responsible for that road as the source for project-specific status and restrictions. Conditions can change, and general guidance cannot confirm whether a particular bridge is open today or whether a given detour suits your vehicle.
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Recheck close to departure and keep options open
Check the agency’s live alerts or traffic-management updates again near departure, and pay attention to changeable message signs along your route. FHWA says pre-trip information can help travelers choose an alternate route, mode, or departure time (FHWA guidance on traffic management centers and work zones).
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Choose an alternate route before you approach the work zone. If the agency expects significant disruption, consider leaving at a different time or using another mode. There is no universal extra-time allowance that applies to every project; the likely delay depends on local conditions and the traffic-management plan. FHWA describes work-zone strategies as balancing safety, delay, work completion, and access according to project constraints (FHWA Work Zone Traffic Management).
Follow the closure, detour, and traffic control
If the road is fully closed
Take the signed detour. FHWA explains that traffic is routed away from the work during a full closure and that detour signs guide motorists onto the detour, through it, and back to the original route (FHWA Road Closure and Lane Closure). Do not drive around a barrier, enter the work area, or assume a familiar road remains passable.
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If lanes or traffic patterns have changed
Slow down, stay alert, and follow temporary signs, flaggers, temporary signals, and barriers. Work zones may narrow the right-of-way, change traffic patterns, and involve workers and construction vehicles entering or leaving the area. FHWA describes traffic control as guiding road users through affected areas; the arrangement varies with the project (FHWA Worker Safety; FHWA Work Zone Management).
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Plan for everyone making the trip
If anyone will walk, cycle, or use a mobility device, check the project notice for a temporary sidewalk, crossing, bicycle route, or accessible detour. FHWA’s temporary traffic-control guidance addresses drivers, bicyclists, pedestrians, and people with disabilities, but it does not establish one universal local detour design. If the project information does not explain a route that works for your party, contact the responsible agency before setting out.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Compare alternate routes on more than travel time
When choosing among routes, check whether the agency lists each one as open and usable, whether the detour is signed and reconnects with your intended corridor, and whether published vehicle restrictions apply. Consider how dependable the trip is likely to be, not only the best-case time. Also verify whether the route works for pedestrians, cyclists, or anyone with accessibility needs. Project-specific restrictions and routing must be confirmed locally.
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What federal work-zone rules do—and do not—establish
FHWA reports that its 2024 Work Zone Safety and Mobility Rule and Temporary Traffic Control Devices Rule were published in the Federal Register on November 1, 2024, and took effect December 2, 2024. FHWA describes their application to Federal-aid highway projects (FHWA Regulation and Policy). Those rules do not mean every local project has the same detour, schedule, or accessible route; consult the responsible agency for the specific trip.
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