LNW-GW Joint
Veteran Member
Network Rail sets the national rail timetable, based on bids by the individual TOCs (passenger and freight).
There is an iterative process lasting (I think) 18 months or so, leading up to the two main change dates in each year.
Draft timetable are prepared and reviewed, with amendments made by both TOCs and Network Rail.
December is the main change date, May is normally a secondary change, with fewer alterations.
These dates are coordinated (to a degree) across Europe.
The TOCs have timetable plans based on their franchise agreements with the DfT (ie frequency, stopping patterns, first/last trains etc).
Network Rail has all the details of capacity, speeds and all sorts of factors which affect timetabling (signalling, headway, paths across junctions, station dwell times etc).
A route's requirement for engineering access is also factored into the plans (blockades for track renewals, resignalling, electrification etc).
Once the overall timetable is approved (supposedly 12 weeks before it starts), the TOCs can then publish their local versions of the timetable.
Changes to the timetable can be accommodated, but the process doesn't like major changes at the last minute.
Northern and TPE have been forced into their recent changes by delays in electrification schemes, and have had to replan everything in the last 8 weeks or so.
It's therefore not surprising there is stress in the resulting timetable and the way it is resourced with trains and crews.
The timetable just introduced was intended to start last December.
More big changes across the north are planned for next December to, as electrification completes and more stock arrives.
There is an iterative process lasting (I think) 18 months or so, leading up to the two main change dates in each year.
Draft timetable are prepared and reviewed, with amendments made by both TOCs and Network Rail.
December is the main change date, May is normally a secondary change, with fewer alterations.
These dates are coordinated (to a degree) across Europe.
The TOCs have timetable plans based on their franchise agreements with the DfT (ie frequency, stopping patterns, first/last trains etc).
Network Rail has all the details of capacity, speeds and all sorts of factors which affect timetabling (signalling, headway, paths across junctions, station dwell times etc).
A route's requirement for engineering access is also factored into the plans (blockades for track renewals, resignalling, electrification etc).
Once the overall timetable is approved (supposedly 12 weeks before it starts), the TOCs can then publish their local versions of the timetable.
Changes to the timetable can be accommodated, but the process doesn't like major changes at the last minute.
Northern and TPE have been forced into their recent changes by delays in electrification schemes, and have had to replan everything in the last 8 weeks or so.
It's therefore not surprising there is stress in the resulting timetable and the way it is resourced with trains and crews.
The timetable just introduced was intended to start last December.
More big changes across the north are planned for next December to, as electrification completes and more stock arrives.