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| Re: CBTC installation begins on the Flushing Line (1107468) | |||
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Re: CBTC installation begins on the Flushing Line |
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Posted by Stephen Bauman on Tue Oct 4 22:29:26 2011, in response to Re: CBTC installation begins on the Flushing Line, posted by North-Easten T/O on Tue Oct 4 20:44:12 2011. The only place on the L line now that has Signal are at interlocks.The design specification for the AWS was 3 tph (20 minute headway). The idea was to permit non-CBTC work equipment to go on the line and still maintain schedules. This spec allows the blocks and the interlocks to coincide. The AWS becomes operative, if a train detected on a block does not respond to a radio query. This can happen if foreign equipment is on the track or RF-DCS loses contact with a train. With no knowledge of where all trains are within an AWS block, the only safe operation for CBTC equipped followers is to wait until the AWS block clears. |
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