[Don]

I too was concerned about the safety issue with floor mats as mine tended to bunch up under the pedals from foot movement. An auto interior shop resolved the problem.

The clear plastic runner as found in Home Depot, Lowe's, which has an anti-skid surface was glued , smooth side to the floor mat, to the bottom of the floor mat using the thickest one available. A new binding was sewn around the perimeter of the floor mat. The plastic runner added the rigidity to the mat , preventing the mat from bunching up under the pedals.

Simple fix that really did work.