Cross Tay Link Road

The proposed CTLR Project is located within Perth & Kinross Council area and has been developed to improve air quality within the Perth Air Quality Management Area (AQMA).

A detailed modelling assessment has been undertaken to determine the effects of air quality emissions of oxides of nitrogen (NOx), nitrogen dioxide (NO2) and fine particulate matter (including PM10 and PM2.5,) from the proposed CTLR Project on sensitive human receptors. The potential impact upon ecological receptors was scoped out of this assessment. The methodology of this assessment has been scoped with the Council’s Environmental Health Team.

The main focus of the assessment is the potential impact of road traffic emissions on local air quality. It aims to assess air quality at locations where residential properties or other sensitive receptors may be affected by changes to traffic activity associated with the proposed CTLR Project. The assessment also considered the potential impact upon air quality during construction with regards to dust emissions.

The risk assessment of construction phase activities concluded that dust during construction could potentially affect nearby residents. A series of mitigation measures have been recommended which aim to ensure that there will be no adverse effects due to construction dust. Accordingly, mitigation measures will be implemented as required as set out in the outline Construction Environmental Management Plan (CEMP), along with appropriate management and monitoring measures.

The air quality assessment considered seven modelling scenarios for both current (2017) and future (2023 and 2038) baseline air quality, and the impact of road traffic emissions on concentrations of NO2, PM10 and PM2.5 at receptors have been predicted using atmospheric dispersion modelling using the Ricardo Energy & Environment RapidAIR® model. Annual mean concentrations of each pollutant have been modelled within the study area that matches the area included within the transport model. 

The assessment has predicted that changes to traffic flows when the proposed CTLR Project becomes operational will have a positive effect on annual mean NO2, PM10 and PM2.5 concentrations at the majority of locations assessed, particularly within Perth AQMA in the City Centre and Bridgend.

To view the full Air Quality assessment please click: