[8] Route shield pavement markings are intended to aid older drivers who have experienced a decline in working memory or attention span.
[9] In Knoxville, Tennessee, route shields were affixed to the Interstate 40 road surface as a cost-effective mitigation for a high crash rate caused by weaving maneuvers.
[10] The Ohio Department of Transportation suggests route shield pavement markings as one method for park and trail managers to display reassurance markers along off-road portions of U.S.
It is half the width of a standard Interstate highway lane; like some other kinds of pavement markings, it is elongated to appear proportional to a driver traveling at high speed.
[12] A 2010 study by the Texas A&M Transportation Institute found that route shield pavement markings combined with directional arrows were more effective than overhead guide signs in stressful situations.