User:Falco sparverius/GLR Proposals/Speed Limits History

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Speed Limit


As of November 2015 the speed limit fields are shown for editors of some countries. These fields should be updated with the official, regulatory speed limit as shown on white, rectangular speed limit signs.

When a speed limit sign changes the speed limit within a segment, the segment may be

Speed limit example

cut to create a new junction to accurately reflect the change in speed limit.

{The following section needs review} If the speed limit sign is only a short distance (less than 200') from the beginning of a new segment, then adding a junction may not be necessary, and the speed limit may change at the nearest junction.

GLR Regional state codes


Michigan has two categories of sign which display driving speeds, and applicable to the Speed Limit Discussion.


REGULATORY SIGNS - Inform the driver of traffic or regulations concerning vehicle operation on the highway (i.e.; stop, yield, speed limit signs, etc.).


WARNING SIGNS - Advise the driver of unexpected highway conditions which require extra care driving (i.e.; curve, stop ahead, Chevron signs, etc).

MMUTCD - Section 2C.01 Function of Warning Signs Support:

01 Warning signs call attention to unexpected conditions on or adjacent to a highway, street, or private roads open to public travel and to situations that might not be readily apparent to road users. Warning signs alert road users to conditions that might call for a reduction of speed or an action in the interest of safety and efficient traffic operations.

Basic Speed Law

MCL 257.627 - Speed Limitations

(1) A person operating a vehicle on a highway shall operate that vehicle at a careful and prudent speed not greater than nor less than is reasonable and proper, having due regard to the traffic, surface, and width of the highway and of any other condition then existing. A person shall not operate a vehicle upon a highway at a speed greater than that which will permit a stop within the assured, clear distance ahead.