Balfour Beatty and Alun Griffiths have picked up contracts to build the first two phases of the Bristol Guided busway.
The Metrobus scheme, which received another state grant towards its construction earlier this week, has three phases in all (see map below) and carries a total price tag of £200M.
Balfour Beatty has been awarded the £26M deal to design and build the 4km section from Ashton Vale to Temple Meads station.
Preliminary works will begin this month. The main construction work will start in June and be finished by October 2016.
Alun Griffiths will construct the 4.5km phase linking the A370 Long Ashton Bypass to the south west of Bristol with the A4174 at Hartcliffe Roundabout, south of the City Centre. It is worth an estimated £19M.
The third phase runs from the North Fringe of Bristol to Hengrove Park in the south.