A divided highway can add to safe and relaxed driving, economy, and the 
beauty of the landscape. Each lane should seek its own best location, set 
apart from its twin by a variable-width median of natural terrain. Since each 
lane is screened and usually above or below its twin, the driver feels secure; 
he can enjoy his surroundings without distraction by oncoming headlights or 
traffic. In planning median strips, it is well to avoid leaving remnants of 
original vegetation which seem unsuited to their new environment. As one 
remedy, transition plantings close to the native trees can soften the sharp 
contrast of leafless trunks and roadway. 
Discontinuous alinement, such as broken-back curves or hidden dips, 
disrupt the relation of the road to the terrain. 
46 
tends to 
