Hidden Driveway signs are used when there is limited sight distance to a driveway that is not correctable by the property owner (by cutting tree limbs or other vegetation, or removing other obstructions). If the available sight distance is less than the stopping sight distance for the posted speed limit, a hidden drive sign may be warranted.

A “Hidden Driveway” sign may be used in advance of a driveway if the stopping sight distance, based on the posted speed limit, exceeds the available sight distance (refer to the AASHTO Greenbook, 7th edition, Chapter 3 for sight distance calculations) AND at least one of the following criteria is met:

For example, a hidden driveway sign may be requested where the real issue is a speeding problem (i.e., the driveway is not hidden at the posted speed limit), an 18 mph speed limit sign may be requested to “grab their attention,” or stop signs may be placed at all four legs of a residential intersection with clearly adequate sight distances to “slow everyone down” (that’s not what stop signs are for).

Can I get a "blind driveway" or "hidden driveway" sign? No. The responsibility for providing a safe driveway falls to the driveway owner. A sign does not improve the view or make the driveway safer.