Glossaries

Definitions: V - Z

Value Engineering – "The systematic application of recognized techniques by a multi-disciplined team to identify the function of a product or service, establish a worth for that function, generate alternatives through the use of creative thinking, and provide the needed functions to accomplish the original purpose of the project, reliably, and at the lowest life-cycle cost without sacrificing safety, necessary quality, and environmental attributes of the project (CFR Title 23 Part 627). "

Variance – See Design Variance.

Vertical Alignment (Profile Grade) –  The trace of a vertical plane intersecting the top surface of the proposed wearing surface, usually along the longitudinal centerline of the roadbed, being either elevation or gradient of such trace according to the context. 

Vertical Curve – See Curves: Vertical Curve.

Weaving – The crossing of two or more traffic streams traveling in the same general direction along a significant length of highway without the aid of traffic control devices (with the exception of guide signs). Weaving segments are formed when a merge area is closely followed by a diverge area, or when an on-ramp is closely followed by an off-ramp and the two are joined by an auxiliary lane (TRB Highway Capacity Manual, 2000).

Work Zone – The work area and the section of highway used for traffic control devices related to the work area (NJDOT, 2006).

Yield Line: A broken line marked across the entry roadway where it meets the outer edge of the circulatory roadway and where entering vehicles wait, if necessary, for an acceptable gap to enter the circulating flow.

Y Interchange - See Interchanges, Three-Leg Interchange.