Manual on Uniform Traffic Control Devices

Full-size image of Figure 8B-8

Figure 8B-8. Typical Train Dynamic Envelope Pavement Markings

This figure illustrates train dynamic envelope pavement markings.

The figure shows a horizontal two-lane roadway. Double yellow lines separate the two lanes. A legend shows that a black arrow indicates the direction of travel. Black arrows on the roadway show the direction of travel as one lane in each direction.

A note states: "In an effort to simplify the figure to show the dynamic envelope markings, not all pavement markings or other required traffic control devices are shown."

In the center of the figure, a symbol of a vertical railroad track is shown across the roadway. The train dynamic envelope is indicated as an area extending on both sides of the track for an undimensioned distance. Vertical white pavement markings that are parallel to the track are shown extending across the roadway at the edges of the dynamic envelope. The markings are shown as a dimension of 100 mm (4 in) wide. The distance from the edge of the pavement marking to the outside edge of the railroad track is noted as: "The distance between rail and dynamic envelope pavement marking should be equal to 1.8 m (6 ft) unless otherwise advised by the operating railroad."

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