Usually, glass balls pile up on the top “groove,” or top edge of a racetrack, according to HowStuffWorks. When NASCAR drivers have to drive along an overhead groove – for example, if they are forced out of a “racing groove” or indoor fast lane – they are likely to run over several of these marbles, and they will have to veer back and forth to remove the parts rubber tires from its tyres.
.
[ad_2]