A £210,000 scheme to boost gas supplies in Huddersfield will get under way this month.
But it will also mean road works misery for people in Newsome.
The extra work comes when peak-time drivers still face some hold-ups because of traffic signals controlling single-file traffic on the weak bridge at the junction of Newsome Road and King's Mill Lane.
Engineers working for gas pipeline company Transco will replace 2.2km of old metal gas main in Stile Common and Newsome with modern, more durable plastic pipe.
The work will start on February 14 and is expected to last 22 weeks. In order to keep disruption to a minimum, it will be carried out in phases using a trenchless mains- laying technique.
The first phase of the works will take place at Tunnacliffe Road, followed by Stile Common Road.
The second phase will involve mains at Dawson Road, Hillside Crescent, Ing Lane and Headfield Road.
The third phase will involve the upper part of Newsome Road, between the junction of Tunnacliffe Road and Jackroyd Lane.
This section of works is not expected to start before the end of June and will be agreed with Kirklees Council highways officials.
The final phase will mean replacing mains at the busy crossroads junction of Newsome Road, Jackroyd Lane and Church Lane.
This will be carried out in the school holiday period to lessen its impact on traffic.
Transco network operations manager Mark Chapman said: "Although it's inevitable that this work will cause some disruption, it's essential we carry it out in order to guarantee the continued safety and reliability of gas supplies in this part of Huddersfield.
"I can only apologise for any inconvenience and promise we will do everything we can to keep it to a minimum."
Temporary traffic lights are expected to be in operation during the work.
Transco's work in Huddersfield is part of the company's on-going multi-million pound maintenance programme in West Yorkshire.