Traffic Assessment - Renfrewshire Council

3.7 Furthermore, with the increase in GFA for the foodstore to 6,000m 2 , the critical cumulative
weekday period for the revised masterplan will be the PM peak. Consequently, and as agreed with
Renfrewshire Council, the travel characteristics and resultant impact have been considered for the
weekday PM peak only.
3.8 The following methodology has been adopted to calculate the travel characteristics and establish
the additional trip generation for the proposed 6,000m 2 foodstore:
• Step 1 – Calculate total people trips;
• Step 2 – Calculate the mode share and trips by mode;
• Step 3 – Calculate split of Dargavel and Bishopton generated people trips;
• Step 4 – Determine number of pass-by / diverted vehicle trips; and
• Step 5 – Distribute and assign the additional external vehicle trips to the wider road network.
Step 1 – People Trip Assessment
3.9 National policy focuses upon providing an integrated transport provision, in line with
accommodation and provision of alternative modes of transport to the private car. It encourages
and requires developers to promote alternative travel options, accepting that Transport
Assessments should not be on the basis of accommodating car based trips by creating more road
space through junction improvements, but should be balanced with more sustainable modes of
transport.
3.10 As is consistent with the approach adopted for the 2008 Transport Assessment, the people trips for
the proposed foodstore have been calculated using trip rates extracted from the TRICS database
(version 2012b). Trip rates and total people trips for the weekday PM peak period are provided in
Table 3.2 below. For comparison, the weekday PM people trip generation for the 2,500m 2 foodstore
is also indicated.
Table 3.2 Total People Trips - 6,000m 2 Foodstore
Trip Rates PM Peak (1700-1800) People Trips PM Peak (1700-1800)
In Out Total In Out Total
6,000m 2 Foodstore 8.21 8.25 16.46 493 495 988
2,500m 2 Foodstore 11.7 11.52 23.22 293 288 581
3.11 The 2012(b) TRICS data indicates the proposed foodstore is likely to generate a total of 988 twoway
people trips during the weekday PM peak period in comparison to the 581 two-way trips for the
previous 2,500m 2 store, representing an increase of 407 people trips.
3.12 It should be noted that the reduced trip rates from TRICS between 2008 and 2012 is a result of the
increased floorspace i.e the trip rate reduces as the duration of stay at a larger foodstore is longer
when compared to a smaller sized store.
Page Job No Report No Issue no Report Name
12 SCT3526 1 1 Dargavel Village
Proposed Village Core Development