2009 Edition Part 3 Figure 3B-9. Examples of Dotted Line and Channelizing Line Applications for Entrance Ramp Markings (Sheet 2 of 2)
Figure 3B-9. Examples of Dotted Line and Channelizing Line Applications for Entrance Ramp Markings (Sheet 2 of 2)
This figure illustrates three examples of dotted line and channelizing line applications for entrance ramp markings. The figure is composed of two sheets.
Sheet 2 of the figure shows a vertical highway, example C.
- A legend shows a black arrow indicating the direction of travel in the lanes.
- Example C, tapered acceleration lane, shows the two lanes of one direction of a divided highway. Arrows indicate that the direction of travel is from the bottom of the figure to the top. A solid yellow line is to the left of the leftmost through lane, a solid white line separates the rightmost travel lane from the right shoulder, and the through lanes are separated from each other by a broken white line. Near the bottom of the figure, an entrance ramp is added to the right of the right through lanes at an angle, creating a tapered acceleration lane. Where the ramp joins the highway at the physical gore, the solid white line on the right edge of the right through lane and the yellow solid line on the left edge of the entrance ramp become wider, solid "white channelizing lines" and then dotted white lines to form a white triangle or neutral area north of the physical gore. The point of the triangle formed by the white lines is the theoretical gore. "B" is shown on the figure as the distance from the physical gore to the downstream end of the full width acceleration lane. The dimension of "0.5 B MIN." is shown on the figure extending from the physical gore to midway on the entrance lane, where the neutral area is formed by solid white channelizing lines. The northern half of the neutral area is formed by a dotted white line extending from the white right edge line of the right through lane and no line extending from the yellow left edge line of the entrance ramp. At the theoretical gore, both the right through lane and the entrance lane are full lane width. A dotted white line extends north from the theoretical gore, labeled an "optional normal width dotted extension of the right-hand edge line," and ends at the extension of the solid white on the right edge of the entrance lane.
Back to: Sheet 1