The newly-installed managed motorway system on the M62 in West Yorkshire is to be tested by the Highways Agency from Monday.
Overhead electronic signs will be tested on the eastbound carriageway of the M62 between junctions 29 (Lofthouse) and 30 (Rothwell) at various times during the week.
During the tests, traffic officers in the regional control centre at Wakefield will open up the eastbound hard shoulder to traffic by setting the overhead signs to tell drivers they can use it as an extra lane.
Variable mandatory speed limits, indicated by a red ring, will also be displayed to help improve traffic flow and reduce congestion.
Traffic officers may also set the signs to indicate lane closures across any of the four lanes using a red X.
The agency is advising drivers to follow the overhead signs.
Drivers are also being reminded that when the hard shoulder should be used for emergency purposes only when is not indicated as a running lane.
The temporary 50mph speed restrictions, indicated by the overhead signs, will stay in place between junctions 28 (Tingley) and 30 while final checks on the equipment are carried out.
The sections between junctions 28 and 30 will be the final sections to be completed.
The managed motorway between junctions 25 and 28 became fully operational earlier this summer.
If next week’s testing is successful, the Highways Agency hopes to make the two remaining sections fully operational later in September.