They're being removed this week - starting on Wednesday night.
Work to replace a 3.5-mile stretch of central reserve steel barrier on the M62 with concrete, providing increased protection for drivers, is coming to an end.
This means that the temporary narrow lanes, reduced speed restriction of 50mph will be removed over four nights, starting on Wednesday 14 March.
Highways England has been replacing the barrier on the M62 between Rothwell and Normanton (junctions 30 to 31). In addition, the £11m scheme, which started in late October last year, also includes resurfacing, bridge maintenance, lighting improvements at junction 31 and also significant drainage improvements.
Highways England's project manager Andy Barlow said: "We have replaced just over a 3-mile stretch of safety barrier on the M62 with concrete which will improve safety and allow us to reopen the road quicker in the event of future incidents.
"Concrete barriers are less susceptible to damage than steel which means that, as soon as an incident has been cleared, it is likely that drivers can be on their way. It also makes it harder for vehicles to crossover on to the other side of the carriageway if they were to strike it, improving safety even further.
"I would like to thank drivers for their patience over the last 5 months while this vital improvement work has been taking place."
Once complete the work will have provided 3.5 miles of new concrete barrier, 2.3 miles of drainage improvements and around 17 lane miles of resurfacing.
The remainder of the work will be carried out overnight with a combination of full or lane closures and is expected to be completed by early May.