Dead endUnited States
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17. Dead end
A dead-end road is a road that does not provide a through route for some or all vehicles. It may end completely, terminate at a barrier or continue as a path that only certain road users may use.
Drivers may normally enter a dead-end road to reach homes, businesses, parking places or other destinations, but they must be prepared to turn around or leave by the same route. Signs may indicate that pedestrians or cyclists can continue beyond the point where motor traffic cannot.
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What does a dead-end indication mean in the United States?
The US traffic-sign manual distinguishes DEAD END for a road that ends from NO OUTLET for a road or road system with no other exit. Neither wording is the same as DO NOT ENTER.
Can pedestrians or cyclists continue beyond a motor-traffic dead end in the United States?
Check any lawful pedestrian or cycle connection and the applicable state and local controls. A motor-traffic no-outlet area may still have a path connection, but that does not create a vehicle exit.
Does a dead-end indication change speed or priority rules in the United States?
In the California example, the no-through information itself does not assign junction priority or a numerical speed limit. Continue to obey the actual speed, access, parking and priority controls. If you need to turn around, use a suitable lawful place, check for pedestrians and cyclists, and do not obstruct the space needed for other vehicles to turn.

Traffic rules
United States