Built with safety in mind, the highways have wide lanes and shoulders, dividing medians, or barriers, long entry and exit lanes, curves engineered for safe turns, and limited access.

考虑到安全因素，高速公路有宽阔的车道和路肩、中央分隔带、长长的出入口车道，以及为安全转弯和限制通行而设计的弯道。