Maybe it would work better on an interstate, particularly flat sections, where there are no cyclists, and vehicles are constantly moving forward at high rates of speeds? Warnings could be posted to warn motorcycles not to swerve (e.g. like uneven surface warnings).

And to deter slow-pokes, entire sections of highway can be filled 100 feet deep with the stuff. If anyone slows down too much, the highway sarlacc acquires a tasty meal.