Operation STRIDE: What is a Dynamic Envelope?

A dynamic envelope is known as the area near railroad crossings designed to keep motorists out of the danger zone. White connecting X’s are used to visually highlight the zone at railroad crossings that drivers, bicyclists, and pedestrians should not stop to increase safety for motorists. These markings indicate the clearance needed for trains to safely pass, as any object within the dynamic envelope has the potential to be struck when the train passes through. For more information, visit www.fdot.gov/rail/programs/op....