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Vienna Convention intersection sign (diamond-shaped) New Zealand intersection with priority sign. These signs warn of road crossings at crossroads, T-intersections, roundabouts, or Y-intersections. They may also indicate "hidden driveway" intersecting the road ahead. (Compare with bridges, overpasses, viaducts).
Some signs can be localized, such as No Parking, and some are found only in state and local jurisdictions, as they are based on state or local laws, such as New York City's "Don't Block the Box" signs. These signs are in the R series of signs in the MUTCD and typically in the R series in most state supplements or state MUTCDs.
Examples of warning signs are crosswalk signs. curve warning signs, intersection ahead signs, flagger signs, workers signs, or road machinery signs. Guide signs help road users navigate to their destination. These signs are generally rectangular in shape and have white text on green backgrounds.
As millions of Americans begin another season of winter driving, they may see a sign with a cryptic warning: "Bridge Freezes before Road." (Or perhaps the sign reads "Bridge Ices Before Road" or ...
A number of countries do not give information for the road ahead (so-called "pull-through" signs), and only for the directions left and right. Advance directional signs enable drivers to take precautions for the exit (e.g., switch lanes, double check whether this is the correct exit, slow down).
An uncontrolled intersection in suburban Melbourne, Australia. At uncontrolled 4-way intersections, the common rules are: . give way to traffic approaching from the passenger's side (i.e. from the right in countries that drive on the right-hand side, a rule known as priority to the right, and vice versa) [citation needed]
The Manual on Uniform Traffic Control Devices for Streets and Highways (usually referred to as the Manual on Uniform Traffic Control Devices, abbreviated MUTCD) is a document issued by the Federal Highway Administration (FHWA) of the United States Department of Transportation (USDOT) to specify the standards by which traffic signs, road surface markings, and signals are designed, installed ...
In some jurisdictions (such as New York City), [citation needed] there are ordinances or by-laws against "gridlocking".A motorist entering an intersection (even if on a green light) but unable to proceed and who gets stranded in the intersection (when traffic ahead fails to proceed), and who remains after the light turns red (thus blocking traffic from other directions) may be cited.