"Approach" means not more than three miles of the traffic artery on either end of the bridge and within that limit shall mean so much of the traffic arteries on either end of the bridge as shall be required to develop the maximum traffic capacity of the bridge [...]

"Approach" means that distance on either end of a bridge as shall be required to develop the maximum traffic capacity of a bridge, including but not limited to necessary rights of way, grading, paving, minor drainage structures, and such other construction [...]