Phase 3 – Capacity Assessment Sample Clauses

Phase 3 – Capacity Assessment. Phase 3 of the analysis assessed the capacity usage on the Wessex mainline (SW105 route) where the Alliance aspirations are proposed to operate. The assessment covered from 05:00 until 22:59 as this time period covers when the Alliance aspirational paths are proposed to operate within. The assessment focused on selected compulsory timing points spread along the route; Clapham Junction, Farnborough, Winchester and Eastleigh. These four locations were chosen to represent the majority of the Southwest Main Line: Clapham Junction is the timing point that all Main Line services will travel through, Farnborough is the closest mandatory timing point to Winchfield, where all Alliance paths are assumed to change running lines, Winchester is the mandatory timing point in the 2-track section of the line and many services will originate or terminate at Eastleigh T&RSMD via Eastleigh station. The intention was to also undertake the assessment at Basingstoke, Woking and Southampton Central, however due the complexity of the operations at these locations it was not possible to carry out accurate analysis in the time available. The capacity for the December 18 Concept Train Plan was assessed by extracting the services from TPS, then interrogating them using excel to produce a list of routeings through each of the four locations, along with the number of services using each routeing in a given hour. The TPRs were then used to assign a capacity usage value to each routeing, which could be used to calculate the capacity usage in minutes during hour blocks. The capacity value for each routeing was calculated by separating each timing point out into platforms and lines at each side of the timing point and determining how soon after the given routeing that the line or platform could be occupied by another service. The capacity usage in an hour was averaged over the lines at either side of the timing point and the platforms and the maximum of these three averages was considered to be the capacity usage for the station in that hour. An identical assessment was then undertaken for the December 16 timetable to enable a comparison between the capacity usage in the current operating timetable and the proposed concept train plan.