U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
Definition: Amount of offset between conventional left turn lane(s) on this approach and opposing approach. Offset refers to direction (plus or minus) and distance between the centerline of the left turn lane on this approach and the centerline of the left turn lane on the opposing approach. The direction is positive if the left turn lane on this approach is to the left of the opposing left turn lane and negative if vice versa. If the opposing left turn lanes are aligned, enter "0".
Attributes: Sign (+ or -) and distance (feet )
See Figure 12 for additional detail.
HPMS/Tool Requirements: None
Figure 12. Illustration of Positive, Negative, and Zero Offset Distance.