. Railway track and track work . er flat posts about 3X12 ins., orlarge boards on posts. Sometimes the boards are only 4 ft. above the ground,but a greater height is preferable. On the Pennsylvania Lines, these signs aremade to conform to the standard position of signals. Thus, one has Slowin white letters on an inclined green arm; and the other (Fig. 116) has Stop 184 TRACK. in white letters on a horizontal red arm. The arms are 8 ins. wide, with , and point to the right of the track. The posts carry green or red switchlamps. These signs are used where all trains must be under con
. Railway track and track work . er flat posts about 3X12 ins., orlarge boards on posts. Sometimes the boards are only 4 ft. above the ground,but a greater height is preferable. On the Pennsylvania Lines, these signs aremade to conform to the standard position of signals. Thus, one has Slowin white letters on an inclined green arm; and the other (Fig. 116) has Stop 184 TRACK. in white letters on a horizontal red arm. The arms are 8 ins. wide, with , and point to the right of the track. The posts carry green or red switchlamps. These signs are used where all trains must be under control, or cometo a stop, the Slow sign being set 2,000 ft. from the danger point, while trackcrossings have the Stop signs at a distance of 300 ft. in each direction. TheBaltimore & Ohio Ry. uses similar signs. The post is an old rail, 13 ft. long,set 3 ft. in a 12-in. hole, 3^ ft. deep, fitted with concrete. The arm is of , 3 ft. long, 7 ins. deep at the post and 8 ins. at the end. The letters are BIG LAKE ONE MILE. nn i&W- . Front Elevation. Side Elevation Track Signs.
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