Rotherhithe Tunnel Ventilation Shaft (1)

MQT on 2015-09-16
Session date: 
September 16, 2015
Question By: 
Murad Qureshi
Labour Group
Asked Of: 
The Mayor


What action are you taking to mitigate particulates from the Rotherhithe Tunnel being released into King Edward Memorial Park and the adjacent children's playground?


Answer for Rotherhithe Tunnel Ventilation Shaft (1)

Answer for Rotherhithe Tunnel Ventilation Shaft (1)

Answered By: 
The Mayor

The ventilation system's purpose is to maintain a healthy tunnel environment for users, including cyclists and pedestrians, and in the event of an emergency to control the direction of any smoke.

It is not feasible to mitigate (i.e. filter) the release of particulates from road tunnels. The size of the particulates would require an extremely fine filter to effectively prevent their release into the atmosphere. Implementing such a filter would alter the flow of air through the shaft, preventing the ventilation fans from operating as designed for the safety of tunnel users.

Vehicle emissions are impacted directly via Low Emission Zone (LEZ) legislation and will be further impacted by the Ultra Low Emission Zone (ULEZ) in the future.