Analysis of 504 King: Part VI – Tuesday, December 12, 2006

Weather:  Early morning rain

Today we get to watch a particularly spectacular example of how a line can be mismanaged to produce poor service.

The morning peak is a bit disorganized with the usual flurry of short-turns eastbound at Parliament.

At about 10:50, a gap opens up westbound from Yonge with four cars (runs 23, 2, 3 and 4 showing as mauve, pink, yellow and turquoise respectively) arriving as a group at Roncesvalles at about 11:20.  Run 2 short-turns, but there is still a 20-minute gap eastbound which has stretched to 30 minutes by the time it reaches Broadview Station between 12:15 and 12:45.  This quartet merges with another pack of cars as described below.

Runs 6 , 7 and 8 (dashed yellow, dashed turquoise, blue) arrive together at Broadview Station just after 10:50 am, returning westbound as a pack.  Run 7 is short-turned at Roncesvalles, and emerges in front of run 6, but at the tail end of another pack consisting of runs 23, 4, and 5 (mauve, turquoise, purple).  This pack of cars runs east from Roncesvalles following a long gap at about 11:50 am.  Run 7 could have come out into the gap, but waited until after the gap cars had passed.

A parade of 7 cars arrives at Yonge eastbound at 12:20 following a gap of 24 minutes.  Not surprisingly, the first of the cars has a 3 minute dwell time at Yonge (given the resolution of CIS data, only long dwell times show up on the charts).  All 7 cars head off in the period between 12:23 and 12:29 during a period when the scheduled headway is supposed to be 4’45”.  Of these cars, three turn at Church, two at Parliament and the other two go through to Broadview Station where the gap has been almost half an hour.

Service is more or less sorted out westbound as the various short turns come back into the line.    However, it does not take long for a bunch to form eastbound again behind run 6, and runs 6 through 8 all arrive at Broadview Station around 14:30.  The cars use their ample recovery time to return to the appropriate spacing.

In this case, cars that should have short-turned (the original pack arriving at Dundas West around 11:20) didn’t, and this resulted in both a large gap and the need for much more aggressive short-turning on the return trip.

By the evening, runs 6 and 8 have teamed up again.  Around 19:00, runs 6, 8 and 10 cross the city as a trio.  Run 8 turns at Roncesvalles, while 6 and 10 continue to Dundas West.  Eastbound, run 10 goes out of service, and run 6, operating behind run 8, is short-turned.  However, on the westbound trip, run 6 comes out just ahead of run 8 at about 20:55 and they again run as a pair.  Run 8 short-turns at Roncesvalles around 21:23, but comes out immediately ahead of run 6 at 21:38 and again these cars travel east across the city as a pair.  No surprise, then, when run 6 is short-turned at about 22:10.  The spacing finally sorts itself out westbound at about 22:30.

One could speculate about what is going on here, but whether this is collusion between two operators to take complementary short-turns or mismanagement by CIS, the effect is the same.  Needless gaps in service are created that have nothing to do with passenger load or traffic congestion.

King Dec 12 Graphic Timetable

King Dec 12 Headways Westbound

King Dec 12 Headways Eastbound

King Dec 12 Link Times Westbound

King Dec 12 Link Times Eastbound