The one-way system on Quarterbridge Road will be extended to the bottom of Bray Hill from the start of March.
It's been revealed only northbound traffic is permitted on the route and vehicles heading south will be diverted along Tromode Road.
The footpath reconstruction scheme will also involve some road resurfacing work taking place at night time with a full closure.
The work will run from March 1 until no later than Wednesday 31st March.
One hour MEDS phone line outage this evening
Planning fireworks? Let the airport know
FOI reveals nearly 90,000 untaxed vehicles
Ramsey Remembrance service to be marked by maroon rockets
MEDS phone line to be down temporarily
Committee to examine link between poverty and poor academic performance
Police advice for trick-or-treaters to stay safe
How will Manx Care reduce the number of negligence claims?