to the visible elements of the highways. Highway engineers who design the geometry of highways must also consider environmental and social effects of the design on the surrounding infrastructure.

There are certain considerations that must be properly addressed in the design process to successfully fit a highway to a site's topography and maintain its safety. Some of these design considerations are:
* Design speed
* Design traffic volume
* Number of lanes
* Level of service (LOS)
* Sight distance
* Alignment,