stations Double-ended sidings (loops) good for typical passenger trains (10~12 cars) are provided at 3~8 mile intervals, at local stations. Some stations have an island platform serving middle siding tracks, and straight-through outside bypass tracks. Schedules provide extra dwell time for trains to hold until an express passes, also serving as en route recovery time, improving reliability. Some stations in single-track territory feature three passing tracks, allowing freight or other equipment to be stowed while opposing passenger trains pass one another. Close proximity of sidings allow TRA to squeeze 5~6 tph (both directions, mixed traffic) out of single-tracks. Double island platforms at transfer stations Train terminations and transfers (express/local, branch/mainline) occur at strategic interchanges where double island platforms and full crossovers are provided. Platforms between siding and mainline provide cross-platform transfers, and allow staff to clear terminating trains without obstructing mainline. Where many trains originate/terminate, additional platforms are provided. Crossovers allow convenient layover access and easy multiple-unit (MU) reversals. Side platforms and through tracks Island platforms are not ideal for vertical passenger flow. Side platforms allow direct access from stationhouse through fare control. Through track serves the stationhouse at major stations, where most expresses stop. Middle bypass tracks are available for switching, temporary equipment storage, train preparation, and allows passenger trains to pass freights. Stationhouses are usually on the northbound side (up direction, to Taipei), where originating passengers are voluminous. At minor stations, mainline serves the island platform; locals serve the stationhouse while waiting for overtaking expresses. Explicit scheduling and dispatching priorities Like classic American railroads, TRA's published timetable specifies train class (thus dispatching priority). Premium-fare expresses, like Tze-Chiang, have highest priority and almost never take sidings. Customers understand the system, and aren't surprised when lower priority trains are held, allowing others to pass. Dispatching decisions are fairly straightforward; even when trains are out of sequence, stationmasters wouldn't hesitate to hold trains if releasing them could delay a subsequent Tze-Chiang. Close proximity of sidings mean unscheduled holds are likely short, usually less than 5 minutes. Schedule, ridership pattern, and demographics TRA's schedules are not tightly constrained by clock face patterns or policy headways. Extra trains and cars are added on peak travel days to accommodate holiday traffic. 6~8% more departures are scheduled on Fridays, Saturdays, and Sundays. TRA riders span the full gamut including lower-income (students, young adults) and minorities (Hakka, Taiwanese aborigines) but also choice riders (vacationing families, foreign