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| Re: Question about the Queens Blvd CBTC. (1532154) | |||
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Re: Question about the Queens Blvd CBTC. |
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Posted by Stephen Bauman on Mon Dec 9 16:58:33 2019, in response to Re: Question about the Queens Blvd CBTC., posted by AlM on Mon Dec 9 16:37:29 2019. there is something seriously wrong with that logic.Not at all. The braking time for the follower is V/a. If V is infinite, then V/a is also infinite. The follower's braking time is one component of headway. Similarly, if V were 0 and the train length were L, then the time for the leader to completely pass a point is L/V. That's also infinite. That's the headway's other component - the time for the leader to pass a point. So, (L/V) + (V/a) has a minimum value somewhere between 0 and infinity. You need a leader and follower to define a headway. |
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