Silvertown Tunnel - air pollution impact

Meeting: 
MQT on 2016-10-19
Session date: 
October 19, 2016
Reference: 
2016/3663
Question By: 
Caroline Russell
Organisation: 
City Hall Greens
Asked Of: 
The Mayor
Category: 

Question

What are a) the current NO2, PM2.5 and PM10 levels of exposure from existing traffic and b) anticipated increases in exposure from new journeys on communities living and working at the tunnel portals?

Answer

Answer for Silvertown Tunnel - air pollution impact

Answer for Silvertown Tunnel - air pollution impact

Answered By: 
The Mayor

The evaluation of effects for air quality has been carried out in accordance with Highways England’s Design Manual for Roads and Bridges. It shows a forecast reduction in exposure at the tunnel portals compared with the existing situation.  

 

The ‘existing levels’ of NO2, PM10 and PM2.5 have been calculated and verified against actual monitored concentrations and traffic data has been used to assess the effect of the scheme on air quality.

 

The below table shows the effects on the locations closest to the northern and southern portals that have air quality receptors. Receptor 21249, the Hula development, is the single most impacted property.

 

 

Receptor 3714 –

located 50m west of Blackwall Northern Tunnel Portal.

Receptor 21249 –– located 180m North of Silvertown Northern Portal, 10m east of the roundabout that the tunnel roads flow into.

Receptor 21183 –

located 480m south east of Silvertown southern portal and 700m south east of Blackwall Portal.

NO2

PM10

PM2.5

NO2

PM10

PM2.5

NO2

PM10

PM2.5

Existing

69.7

27.2

18.4

48.5

24.1

16.6

36.2

23.1

15.9

2021 With Scheme

50.4

24.4

15.9

45.0

22.5

14.9

28.1

21.1

14.1