2009 Edition Part 3 Figure 3B-10. Examples of Applications of Freeway and Expressway Lane-Drop Markings (Sheet 5 of 5)
Figure 3B-10. Examples of Applications of Freeway and Expressway Lane-Drop Markings (Sheet 5 of 5)
This figure illustrates five examples of freeway and expressway lane-drop markings. The figure is composed of five sheets.
Sheet 5 shows a figure labeled "E – Auxiliary lane, such as at a cloverleaf interchange." A legend shows a black arrow indicating the direction of travel in the lanes.
The figure shows the two lanes of one direction of a divided highway with an entrance ramp added at the bottom and an exit ramp added at the top of the figure. 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, a curving entrance ramp is added to the right of the through lanes. Where the ramp joins the highway, the solid white line on the right edge of the right lane and the yellow solid line on the left edge of the entrance ramp become wide solid white lines that then become a white triangle or neutral area in front of the physical gore. These solid lines then become white channelizing lines that join at the theoretical gore and continue as a "wide solid white lane line (optional, variable length) or wide dotted white lane line." This auxiliary lane runs parallel to the rightmost through lane and is separated from it by a dotted white line. A note states: "Wide dotted white lane line for full length of auxiliary lane between the theoretical gores of the entrance and exit ramps or between the upstream and downstream ends of the optional wide solid white lane lines."
Further north, the dotted white line is shown changing to a solid white line noted as a "wide solid white lane line (optional, variable length) or wide dotted white lane line." It is shown changing to a solid white line in advance of the theoretical gore at an exit ramp to the right. The solid white line is labeled as a "wide solid white lane line (optional, variable length) or wide dotted white lane line." The auxiliary lane angles to the right to become the exit ramp. On the left side of the exit ramp, the white lane line joins the white edge line from the right through lane to become white channelizing lines that then form a white triangle or neutral area in front of the physical gore. This triangle is shown with "optional white chevron markings in the neutral area." The exit ramp angles away to the right. An arrow indicates the direction of travel on the ramp.