Original Version

Rule 77.4-B

77.4-B.    Under Bridges, ETC

A reduction of the clearance given in Table 1 to a clearance of not less than 14 feet above rails is permitted for trolley span wires under bridges, in tunnels, or in subways, provided the railways does not transport freight cars where the vertical distance from the top of car or load to trolley contact conductor is less than 6 feet.  The grading of the level of trolley span wires from the basic clearance to this reduced clearance is permitted at approaches to bridges, tunnels, or subways.

Strikeout and Underline Version

Rule 77.4-B

77.4-B.    Under Bridges, ETC

A reduction of the clearance given in Table 1 to a clearance of not less than 14 feet above rails is permitted for trolley span wires under bridges, in tunnels, or in subways, and for 0 - 750 volt conductors within exclusive and semi–exclusive rights–of–way as defined by Alignment Classification 9.04–a. and 9.04–b.(1), contained in General Order No. 143–A , “Safety Rules and Regulations Governing Light–Rail Transit”, provided the railways does not transport freight cars where the vertical distance from the top of car or load to trolley contact conductor is less than 6 feet.  The grading of the level of trolley span wires from the basic clearance to this reduced clearance is permitted at approaches to bridges, tunnels, or subways.

Final Version

Rule 77.4-B

77.4-B.    Under Bridges, ETC

A reduction of the clearance given in Table 1 to a clearance of not less than 14 feet above rails is permitted for trolley span wires under bridges, in tunnels, or in subways, and for 0 - 750 volt conductors within exclusive and semi–exclusive rights–of–way as defined by Alignment Classification 9.04–a. and 9.04–b.(1), contained in General Order No. 143–A , “Safety Rules and Regulations Governing Light–Rail Transit”, provided the railways does not transport freight cars where the vertical distance from the top of car or load to trolley contact conductor is less than 6 feet.  The grading of the level of trolley span wires from the basic clearance to this reduced clearance is permitted at approaches to bridges, tunnels, or subways.