| 摘要 |
A method and system integrated into and carried out in conjunction with a public transit vehicle arrival information system. The system of the invention comprises at least the receiver portion of a display module which is positioned adjacent a central computer and which provides a received signal indication to the central computer. The received signal indication is, within a fraction of a millisecond, the indicator for signal reception by all receivers in an entire transit system. The central computer uses the received signal indication to calculate the time delay between calculation of arrival times and receipt of the broadcast arrival time data at a plurality of remotely located display modules. The central computer then generates a correction signal which is queued for broadcast to the remote display modules and which instructs the display modules to subtract the calculated time delay from the previously transmitted arrival time.
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