As part of the £8.3 million scheme Highways England will be widening some of the approaches to the M1 roundabout and adding an extra lane to sections of the roundabout itself, increasing it from 2 to 3 lanes.
Most of the work for the 30 week scheme will be carried out during the day. However, some overnight closures will be required with the first taking place tonight, Thursday 2 until Saturday 4 February between 7pm and 6am.
During the overnight closures the M1 southbound carriageway between junctions 46 and 44, and all the approaches to the M1 junction 45 roundabout will be closed so narrow lanes can be installed. While the scheme is ongoing there will also be a reduced speed limit of 50mph on the M1 and a 30mph limit on the slip roads and roundabout.
Highways England project manager Derek Dobinson said:
We are investing more than £15 billion in over 100 schemes across England that will enhance, renew and improve the network. We recognise that this is an important junction which serves a major route into Leeds city centre and is the main access for a number of major businesses and that is why we are investing £8.3 million to improve it.
This scheme, once complete, will improve capacity, reduce congestion and improve the safety for drivers. Predominantly work will be carried out during the day during off peak hours but they may be the occasional overnight closure of the slip roads and the M1.
As well as carrying out improvements to the roundabout, new traffic signal crossings, and improved cycle and pedestrian routes will be installed.
Further information can be found on the scheme website.
Similar improvements have recently been completed at junction 26 of the M62 where it meets the M606. The extra lane was opened to traffic back in December around Chain Bar roundabout and the new traffic signals were installed this month.
Over the next few weeks, contractors will be taking down the old traffic signals and completing the landscaping and pedestrian and cycle route work. These will be carried out at night when traffic levels are at their lowest.
Members of the public should contact the Highways England customer contact centre on 0300 123 5000.
Journalists should contact the Highways England press office on 0844 693 1448 and use the menu to speak to the most appropriate press officer.