The M1 northbound carriageway will be closed from M1 junction 18 while the M1 southbound will be closed between the A14 off slip and the M6 on-slip at junction 19. The closures will take place next Monday and Tuesday night (9 and 10 February) between 9pm and 6am and are necessary to safely install bridge beams for a new bridge being constructed under the M1.
Highways Agency Project Manager Ivan Marriott, said:
Work to build a new road directly under the M1 linking the M6 and A14 to ease congestion and improve journey times at this busy junction is progressing well.
We are undertaking this latest round of work overnight to minimise disruption to motorists and allow our engineers to lift the heavy bridge beams safely into place.
Motorists will be able to follow a diversion and should continue to plan their journeys, leaving extra time if necessary.
During the closure M1 northbound traffic will be diverted on to the A5 northbound at M1 junction 18 to the roundabout with the A4303. From the roundabout, motorists will turn right onto the A4303 and head east to re-join the M1 at junction 20.
M1 southbound traffic will be diverted off the M1 at junction 20 westbound onto the A4303 before heading south along the A5 to re-join the M1 at junction 18.
The M1 southbound will remain open to Junction 19 off slip road for traffic heading east on the A14. A14 to M1 northbound traffic will also be unaffected.
M1 northbound to M6 traffic will be diverted off the M1 at junction 18 northwards on the A5 before turning left onto the A426 to join the M6 at junction 1.
A contingency date of Wednesday 11 February is in place for overnight work in case work is delayed, for example due to severe weather.
Further information on the Catthorpe junction improvement work is available on the Highways Agency website
Members of the public should contact the Highways Agency Information Line on 0300 123 5000.
Journalists should contact the Highways Agency press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.