Block And Interlocking Signals

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400 oo Operation and maintenance 4. 800 oo Total, ... $7, 20000 For doable track Interest on $60, 000 at 6% $3, 600 oo Operation and maintenance 6, 000 oo Total $9, 600 oo To equip a road with the Westinghouse pneumatic will cost about $80, 000 for single track and $100, 000 for double track. This allows for three power stations at a cost of $2, 500 each, and a 2-inch supply pipe for carrying compressed air, the pipe being run on stakes and not buried in the ground. Operation and maintenance wi...ll be the same as with the Hall system, with the cost of running the power stations added. These figures are based on the cost of several installations that have been made by the signal company, but which are of only a few miles in length. The company, for some reason, are unwilling to furnish an estimate for publication, but the figures given will be found very nearly correct. It is possible, however, that with the reduction that has been made of late in the cost of most signal material, the figures may be reduced somewhat.

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