Traffic Assessment - Renfrewshire Council

4.26 It should be noted that although the above calculations have been undertaken for a retail area of
2500 sqm, this has been done purely for transport impact reasons. It is recognised that any retail
element greater than 1000 sqm will require its own planning justification as part of a separate
process.
Employment
4.27 JMP has analysed travel to work data from the 2001 census in order to determine the number of
employees that work and live in the same ward. This analysis has been undertaken in order to
estimate the number of internal trips between the employment and residential elements of the site.
4.28 This data is based on the census data for residents and provides a figure for the number of
employees with a residential origin and employment destination in the same ward. Consequently
the total number of employees who live and work in the same ward can be established and this can
then be expressed as a percentage of the total employees within each ward.
4.29 Table 4.4 indicates the number of employees that live in the ward in which they work for the
Bishopton and Erskine (South East)/Inchinnan wards which contain similar levels and types of
employment to that envisaged at the new site.
Table 4.4 Employees Residing and Working in the Same Ward
Ward Total Employed that
Reside within Ward
Erskine SE and
Inchinnan
Number Employed that
Reside and Work Within
Ward
Residents that live and
work in the same ward
(excluding self-employed)
2,374 360 15.2%
Bishopton 2,570 470 18.2%
Average - - 16.7%
4.30 Table 4.4 indicates that an average of 16.7% of residents are employed in the ward in which they
live. In order to produce a robust estimate of external trips, JMP have assumed an internal trip rate
of 15% for the employment element of the development i.e. 15% of those employed within the new
development site will also live within the Bishopton area.
4.31 This is a lower rate to the 20% figure agreed with the Scottish Executive for the Stirling Major
Growth Area project and given the level of employment envisaged for the site. We would therefore
consider this value to be robust.
4.32 Internal trips (i.e. trips from residential element to employment on site) associated with the
development have an effect on both the generated residential and employment trips.
4.33 This percentage could be applied to either the residential population or the employment population
and it was assumed that the percentage should be applied to the employment figure as this will
relate to a percentage of the available jobs. If the percentage was applied to the residential figure
then a number of jobs would require to be created to meet the demand rather than a percentage of
the jobs which are available.
4.34 Consequently, the percentage has been applied to the total employment available within the new
development and is indicated in Table 4.5 below.