Bike/Walk Tennessee directors Bruce Day and Tom Evans on January 15 tested how compatible grooved thermoplastic edge lines are with cycling, using road bikes with 700x25 tires on a stretch of US 246. The grooved lines presented no problem whatsoever, and they rode on and across them numerous times. Although the lines can be felt, they did not present anything other than the ordinary for a road cyclist.
Grooved thermoplastic road markings may present a more bike-friendly alternative to rumble strips in terms of reducing run-off road crashes. The markings gently alert drivers to reaching the line, and they're not as loud. As an additional benefit, pavement longevity is not adversely affected by them, unlike the case with rumble strips. Bike/Walk Tennessee is proud to have assisted TDOT with this assessment.
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