Traffic Assessment - Renfrewshire Council

Table 3.4 Internal & External People Trip Generation
Dargavel Trips (57%) Bishopton Trips (43%)
6,000m 2 Foodstore In Out Total In Out Total
Walking 30 29 60 23 22 45
Cycling 1 2 3 1 1 2
Public Transport 4 5 10 3 4 7
Car Passenger 68 61 129 51 46 97
Vehicles 177 185 363 134 140 273
Total People 281 282 563 212 213 425
2,500m 2 Foodstore 293 288 581
3.20 Table 3.4 indicates there will be 563 and 425 two-way people trips generated by Dargavel and
Bishopton respectively during the weekday PM peak period. A comparison with the 2008 Transport
Assessment indicates the Dargavel trips above are generally reflective of the people trips for the
2,500m 2 foodstore. It is therefore considered appropriate to ‘discount’ the Dargavel element when
going forward with the traffic impact analysis of the local road network which is consistent with the
2008 approach.
3.21 Therefore, there will be 425 two-way people trips and 273 two-way vehicle trips attracted to the
6,000m2 foodstore from outwith Dargavel Village.
Step 4 – Pass-By and Diverted Vehicle Trips
3.22 Not all of the externally generated vehicle trips to the foodstore will actually be ‘new’ trips to the
local road network. It is reasonable to assume that a number of these trips will be pass-by trips
from within Dargavel Village (associated with either the railway park and ride or the masterplan
employment opportunities that have originated from Bishopton Village) or diverted trips to the
foodstore from people returning home from work to Bishopton (e.g. from Glasgow).
3.23 As is the generally approved approach for assessing retail developments for the weekday PM
peak, it is assumed that 30% of the vehicle trips on the local road network will be pass-by / diverted
trips.
3.24 In terms of any diverted trips, these will likely equate to a minor reassignment of existing traffic at
each of the junctions along the A8 Greenock Road, thereby resulting in a no-net-increase in overall
volume of vehicles.
3.25 Therefore, for the purposes of this assessment, we have assumed that the full 30% will be pass-by
trips and are therefore already included in the total externally generated trips for the overall
Masterplan (Appendix G). The amended total ‘new’ vehicle trips on the existing local road network
for the weekday PM peak period are provided in Table 3.5.
Page Job No Report No Issue no Report Name
14 SCT3526 1 1 Dargavel Village
Proposed Village Core Development