Final answer:
Driving 21-30mph over the speed limit is considered a serious traffic offense with potential penalties including fines and points on your license. Speeding by a small margin might be overlooked, but continuous or excessive speeding attracts law enforcement penalties.
Step-by-step explanation:
The topic of speeding and the penalties associated with it can vary by jurisdiction. In general, driving 21-30mph over the posted speed limit is considered a serious offense and can result in significant fines, points on your driving record, and in some cases, suspension of your driver's license. While there may be a small tolerance for going slightly over the speed limit to account for speedometer inaccuracies, persistently exceeding the limit by substantial margins can attract law enforcement attention and lead to consequences. For instance, causing a traffic hazard by speeding and leaving a long skid mark can be viewed as evidence of reckless driving, even if your speed was not directly measured.