National Case Study[LAName] – 23 Jun 2016
This worked example has been developed by the Low Emission Partnership. It illustrates the form and content of an Emissions and Mitigation Statement, which is underpinned by a more detailed Emissions and Mitigation Assessment (see attached), undertaken with reference to the Partnership's assessment guidelines (EMA-TG 2.0). The aim is to assess the transport emission impacts of the development, propose corresponding mitigation and demonstrate that the latter is balanced and proportionate. This example is based upon a real development site, albeit with adjustments and inventions for the purpose of the example (see notes below for details). It does not include a treatment of mitigation costs.
Finch Manor is a development of 128 Residential dwellings, located within an urban area. This study identifies and describes key features of the development, estimates traffic generated by the site and the nature, scale and impact of associated emissions. It then proposes mitigation to reduce these impacts and estimates associated costs and benefits of action.
A package of on-site mitigation is proposed, which combines residents travel plans with a Low Emission Car Club, in combination with a financial contribution for further compensatory measures. The report concludes that these proposals represent a balanced and proportionate level of mitigation, not least achieving a 94% total mitigation credit, including 14% assured on-site benefits.
Site location is appropriate for the development and good environmental design principles have been applied. Of note, the proposal includes improved pedestrian and cycle links (costing £20,000). There is also a proposal for a contribution towards an extended bus service (£150,000). In recognition, an associated AQ design credit of £17,000 is proposed. This value represents 10% of total site harm (100% of which, it is noted, will be generated even taking these provisions into account).
The base fleet calculation estimates total traffic at 2,100,000 km/y, with associated emissions of 2.9t NOx and 0.3t PM10 over the 5 year impact/benefit period. This represents a combined damage of £119,000. The largest contributors are residents' car journeys, accounting for over 98% of emissions and damage costs.
A package of on-site mitigation is proposed, which combines residents travel plans with a Low Emission Car Club
Estimated benefits from these measures correspond to a 15% reduction in NOx, 11% reduction in PM and 14% (£16,000) reduction in overall damage across the benefit period (5 years). An additional financial contribution of £75,000 is proposed towards supplementary emission reduction measures. Combining the latter with the design credit (£17,000) and on-site mitigation benefits (£16,000) indicates a total mitigation credit of £108,000. This corresponds to 91% of base fleet impacts.
A transport emissions mitigation implementation plan will be prepared to the approval of the LPA prior to commencing work on-site. Associated measures will be put in place prior to first occupation/use. Progress will be monitored against the plan throughout the benefit period (5 years) with annual progress reports made to the LPA.
Action: Residents EV Car Club [ACName]
Action Definition: Establishment of a Low Emission Car Club with membership offered to all residents [ACDescription]
[ACBenefit] Action Mechanism: TRIPS: Assume 10% membership of 'would-be' car owners. Car club estimated to reduce members' car travel by 50%. Overall effect reduces car trips by 10% x 50% = 5% EMISSIONS: 100% reduction of exhaust emissions from electric cars (applicable to member journeys - remaining 5%) MEASURE INTERACTION ADJUSTMENT: Trip reduction (5%) considered as part of travel plan. Therefore measure is assessed for EV journey shift only (5%) => 5% reduction on all exhaust emissions
Action: Residents Travel Plan [ACName]
Action Definition: Travel plan incl. sustainable transport, applies to all residents car trips [ACDescription]
[ACBenefit] Action Mechanism: 10% reduction in residents' car trips
 The following information has been absorbed and reflected within the example: During pre-app discussions, the LA requested that a transport contribution of £168,000 be provided by the development. This level of contribution has been included in the viability assessment for the site and is considered to be of a sufficient level to allow the public transport improvements and the footway / cycleway link to the west of the site to be delivered. These are identified as ‘essential measures’ in the S106 agreement for the outline permission.
 Trip data has been invented for the purpose of the worked example. It was estimated, using LET defaults, based on actual development size and location. The emission and damage costs were then calculated based upon these estimations.
 The on-site mitigation package was invented for the purpose of the worked example.
 Locations and Planning References have been anonymised for the purpose of this case study
This Emissions Assessment and Mitigation Study has been undertaken according to the requirements of the LPA guidance in combination with the Low Emission Partnership’s assessment guidelines (EMA-TG-2.0). The aim is to assess the transport emission impacts of the development, propose corresponding mitigation and demonstrate that the latter is both balanced and proportionate.