THE air quality in Hatfield Tunnel has been questioned after the closure of the northbound lanes. Currently traffic in both directions is flowing through the southbound A1(M) tunnel while work is carried out in the adjacent section. Jenny McCann from WG

THE air quality in Hatfield Tunnel has been questioned after the closure of the northbound lanes.

Currently traffic in both directions is flowing through the southbound A1(M) tunnel while work is carried out in the adjacent section.

Jenny McCann from WGC questioned whether the pollution levels were being monitored and contact the Welwyn & Hatfield Times for answers.

The Valley Road resident said: "Since the Hatfield Tunnel started handling both north and southbound traffic in one tunnel the atmosphere has severely deteriorated.

"Is it safe to assume that the air quality is being monitored, and if it is found to be above normal safe limits, whatever they may be, that action will be taken?"

* To read the Highways Agency's response see this week's Welwyn & Hatfield Times, out now.