3 ms·
The L train is pretty hosed on nights and weekends until summer 2020. Yes, the countdown clocks specifically on the L are often wrong on nights/weekends during
by evanelias 7y ago
The L train is pretty hosed on nights and weekends until summer 2020. Yes, the countdown clocks specifically on the L are often wrong on nights/weekends during this project. It's not surprising. Do you have an example on a line that isn't undergoing a historic multi-year construction project?
- notyourday 7y agoSure. G. It is always fun to watch the train on Lorimer heading towards queens to be 13 minutes away just to see it arrive. The point is it does not matter if the L is going through the historic reconstruction project -- countdown clock should depend on two pieces of real time data and one piece of historic ( same trip data ) from previous sections: 1. Position of the train which is always known on the L because it is an ATC line. 2. Speed of the train. Also known because it is an ATC line. The distance between stations is fixed. The data about speed and the distance train covered at t-1 and t-2 is known. So it is algebra + basic message passing architecture + LCD displays connected to the local systems. 2. Speed of the train