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2009 Edition Part 4 Figure 4D-18. Typical Positions and Arrangements of Shared Signal Faces for Protected/Permissive Mode Right Turns
Figure 4D-18. Typical Positions and Arrangements of Shared Signal Faces for Protected/Permissive Mode Right Turns
This figure shows the typical positions and arrangements of shared signal faces for protected/permissive mode right turns. A legend shows a black arrow indicating the direction of travel on the roadway.
The figure shows two types of examples. The first example is labeled "A – Typical Positions." It shows two signals aligned horizontally on a horizontal pole over a vertical segment of three lanes of a roadway. Upward-pointing black arrows in the center and right lanes denote the direction of travel as straight through, and a white right-turn arrow is shown in the right lane. The left signal is shown above the left lane as a vertical arrangement of circular red, circular yellow, and circular green signal indications. The right signal (labeled as a shared signal face) is shown above the white line separating the center and right lanes as a vertical arrangement of a circular red signal indication, centered above a horizontal arrangement of a circular yellow signal indication to the left of a right-turn yellow signal indication above a horizontal arrangement of circular green signal indication to the left of a right-turn green arrow signal indication. Below these signals, the word "OR" is shown and another three signals shown aligned horizontally on a horizontal pole. The left signal is shown above the left lane as a vertical arrangement of circular red, circular yellow, and circular green signal indications. The middle signal is shown above the middle lane as a vertical arrangement of the same three signal indications. The right signal, , labeled as "optional signal face (serving as shared signal face)", is shown above the right-turn lane as a vertical arrangement of a circular red signal indication labeled as a shared signal face, centered above a horizontal arrangement of a circular yellow signal indication to the left of a right-turn yellow signal indication above a horizontal arrangement of circular green signal indication to the left of a right-turn green arrow signal indication.
The second type of example is labeled "B – Typical Arrangements." It shows the following six arrangements:
- A vertical arrangement of a circular red signal indication centered above a horizontal arrangement of a circular yellow signal indication to the left of a right-turn yellow signal indication above a horizontal arrangement of circular green signal indication to the left of a right-turn green arrow signal indication
- A vertical arrangement, from top to bottom, of circular red, circular yellow, circular green, left-turn yellow arrow, and left-turn green arrow signal indications
- A horizontal arrangement of circular red, circular yellow, circular green, right-turn yellow arrow, and right-turn green arrow signal indications
- A vertical arrangement of circular red, circular yellow, circular green, and right-turn green arrow signal indications, noted as "used only if the green arrow and circular green are always terminated together"
- A vertical arrangement of a circular red signal indication and a circular yellow signal indication, centered above a horizontal arrangement of a circular green signal indication to the left of a right-turn green arrow signal indication, noted as "used only if the green arrow and circular green are always terminated together"
- A horizontal arrangement of circular red, circular yellow, circular green, and right-turn green arrow signal indications, noted as "used only if the green arrow and circular green are always terminated together"
