Traffic Assessment - Renfrewshire Council

Bishopton Retail Transport Assessment
Additional trips generated by P&R during weekday PM peak
Proposed number of spaces for Park and Ride to the west of the railway line = 300
This was indentified by the Demand Study undertaken by JMP (Report dated 1 December 2012)
The 300 space car park would be split into 2 sections with 200 spaces in the north section and 100 spaces in south section.
The new car park would incorporate the existing 80 space car park to west of railway line.
The study identifies the phasing of the 300 spaces, for the north and southern sections and where the demand will originate.
This has been used to estimate the number of new trips that will access the P & R from Station Road
Phase 1 Phase 2 North Section South Section New Station Rd Trips Total Station Road Trips
Existing car park 80 - 80 - - 80
Dargavel Village 45 35 - 80 -
From M8 via new motorway junction 5 75 60 20 - 60
On-street parking (on Station Road) 20 N/A 20 - - 20
Existing latent demand - 40 40 - 40 40
Total 150 150 200 100 40 200
We have assumed that all of the demand from the M8 will access the P&R from the southern access road.
Not all of the 40 trips onto Station Road will be during the weekday PM peak period.
Using ATC data collected on 23 October 2012, we are able to establish the proportion of trips to / from the existing P & R during the weekday PM peak.
The ATC site was located to the east of the railway bridge on Station Road. This therefore allows for an estimate of the existing 80 space car park to the west of the railway line
The ATC results indicated following eastbound and westbound movements from 100 new spaces accessed from Station Road during the weekday PM peak will be:
ATC % of Exisitng New Trips
Eastbound (Out) 29 36% 15
Westbound (In) 17 21% 9
The additional 40 trips onto Station Road equates to only 24 two-way movements onto the wider road network.
It is considered appropriate to discount them from the overall vehicle trip generation as they are negligible in terms of total traffic generated by the Masterplan.
Note: For Station Road Analysis, all traffic requires to be assessed. Using the ratio of arrivals and departures, this can be calculated as follows:
ATC % of Exisitng New Trips
Eastbound (Out) 29 36% 73
Westbound (In) 17 21% 43
Potential Additional Park & Ride Trips
Figure I2