Discussion thread for Monthly line OTP (On time performance)

[ozbob]

Figures are recorded here

This thread for discussion.

[#Metro]

Excellent.
Ipswich line has lower reliability but I suspect that is due to higher frequency in part.
(And also trucks going in to rail bridges).

[mufreight]

What higher frequency? higher than what? the Doomben line?

[somebody]

I don't think the 15 minute weekday daytime frequency to Corinda is a factor in the Ipswich line's lower reliability.  I suspect it's the plethora of bridge strikes in recent days.  What do other jurisdictions do about this?

[Derwan]

Ipswich line has lower reliability but I suspect that is due to higher frequency in part.

Actually, a higher frequency means more peak services - which actually reduces the effect of each late train.

For example, if there were 10 peak services, a single one late would result in 90% on time performance.  If there were 20 services (i.e. a higher frequency), a single late service would result in a 95% on time performance.

I dare say that continued overcrowding on that line (as well as those bridge strikes) has caused the lower reliability.

Interesting to see that the only other line below the overall rate is the Shorncliffe Line.  We have that few peak services that each late one has a larger effect on the percentage rate.

[Golliwog]

Ipswich line has lower reliability but I suspect that is due to higher frequency in part.

Actually, a higher frequency means more peak services - which actually reduces the effect of each late train.

For example, if there were 10 peak services, a single one late would result in 90% on time performance.  If there were 20 services (i.e. a higher frequency), a single late service would result in a 95% on time performance.

I dare say that continued overcrowding on that line (as well as those bridge strikes) has caused the lower reliability.

Interesting to see that the only other line below the overall rate is the Shorncliffe Line.  We have that few peak services that each late one has a larger effect on the percentage rate.

I think what TT means is that with higher frequencies, you can end up with one train running late which can cause the one behind it to get caught behind the first train, causing hte 2nd train to be late too, although IMO, the frequency would have to be pretty high for that to be very significant.

[ozbob]

Bridge strikes impacted on Ipswich line during May, --> http://railbotforum.org/mbs/index.php?topic=2327.msg26813#msg26813

Queensland Transport need to get moving with protective barriers/cross beams, warning tell tails, full cost recovery and penalty enforcement.  

It is laughable to the extreme fining the then operator (QR Passenger) for the actions of the vehicle drivers and a failure by QT to address the issue.

More --> http://railbotforum.org/mbs/index.php?topic=3491.0

[mufreight]

The answer to bridge strikes is simple,
1. Prosecute the driver for negligent operation of a motor vehicle,
2. Confiscate the vehicle and its contents.
3. Full cost recovery from the vehicle owners insurance, the full cos recovery to include all costs of delays, provision of alternative transport and repair of any structural damage caused.
Yes strike beams and more tell tales and warning signs will help but the onus remains on the driver for the safe operation of the vehicle being operated and the hip pocket nerve seems to attract the most attention.
The laws to implement all of these currently exist but are not enforced, one must question as to why not? perhaps they are politically untenable.

[ozbob]

August 2010

Line Section    Operational Punctuality
Beenleigh    93%
Caboolture    88%
Cleveland    91%
Corinda    93%
Doomben    94%
Ferny Grove    94%
Gold Coast    92%
Ipswich    83%
Rosewood    93%
Shorncliffe    84%
North Coast    90%
Metropolitan    89%
Interurban    92%

The Ippy has been joined by the Shorncliffe line in the cellar ??  Must be the level crossing incidents impacting??  Metro at 89% is not meeting targets either ... 

[Derwan]

The Ippy has been joined by the Shorncliffe line in the cellar ??  Must be the level crossing incidents impacting?? 

Interesting.  Only delays affecting a number of trains was the one day we had a track fault.  Morning inbound services are often delayed by conflicts at EJ (x 2) and Bowen Hills, but those delays are generally minor.  I guess there are services that I don't catch that are regularly delayed.

[ozbob]

Our peak on time performance for each line section for the month of September 2010 was:

Line Section    Operational Punctuality
Beenleigh    94%
Caboolture    93%
Cleveland    95%
Corinda    95%
Doomben    96%
Ferny Grove    97%
Gold Coast    90%
Ipswich    89%
Rosewood    91%
Shorncliffe    91%
North Coast    93%
Metropolitan    93%
Interurban    91%

   
Total    93%

Better overall, Ippy still a star!