Right-of-way (ROW) width – which consideration below is NOT a basis for deciding ROW? The width of the highway right-of-way is selected to accommodate several needs. Which of the following is not a direct deciding factor?

Introduction / Context:
Right-of-way (ROW) is the total land corridor acquired for the highway. It must provide for the roadway cross-section now and in the future. Understanding the factors that determine ROW helps optimize cost and safety.

Given Data / Assumptions:

• Standard rural highway with earthworks and drainage.
• Need to provide room for current facilities and planned widening.
• Topography may demand side slopes and berms.

Concept / Approach:
ROW is driven by the plan-view space needs: formation width, side slopes, drainage, utilities, and future lanes. Horizontal curves can require extra width for widening and sight space. While vertical curves affect elevation profiles and sight distances, they do not directly expand lateral land requirements in plan.

Step-by-Step Solution:

Verification / Alternative check:
ROW typical drawings are plan-based; vertical curve design (crest/sag lengths) is along the longitudinal profile and does not, by itself, widen the cross-section.

Why Other Options Are Wrong:
Options A, B, C, and E all relate directly to the lateral extent of land needed.

Common Pitfalls:
Confusing vertical sight distance requirements (a longitudinal matter) with plan-width needs; under-acquiring land and later facing costly relocations.

Final Answer:
Vertical curve requirements (sight distance crest/sag)