The Sendalls Way junction with Tavistock Road has fully re-opened.
The junction was closed on Monday in order to carry out improvements to the signals and crossings and was initially set to reopen in early 2018.
But following feedback from residents and businesses, the work has been postponed.
Councillor Patrick Nicholson, Deputy Leader and Cabinet Member for Strategic Transport, Housing and Planning, said: “On Wednesday, the Leader and I had a meeting with the contractor and asked them to re-open Sendalls Way as soon as they could.
“The works at Sendalls Way were designed so that if the traffic management caused additional delay the works could be re-programmed. This has now proven to be the case, and although this does mean we will have to return to the junction at a later date, we also have to keep the city moving.
“Meanwhile, we are devoting these resources to other parts of the Derriford Transport Scheme.
“We have been working overnight every night (weather permitting) for the past two months and will continue to do so until the work is done.”
The Derriford Transport Scheme is on track to be complete in spring 2018.
The scheme is a regionally important major scheme and vital to delivering homes and jobs in the north of the city. The Heart-of-the-South-West Local Enterprise Partnership (HotSW LEP) is contributing £10.16 million towards the £13 million scheme.
Anyone travelling along this route is advised to plan ahead and allow extra time for their journey.
For more information on the Derriford Transport Scheme, click here.