The N17 Tuam Bypass will be closed to traffic from this evening, with motorists advised of diversion routes.
The Tuam Bypass is being closed from 7:30pm on the evening of Wednesday, August 9 until 5am on Thursday morning.
The closure is to allow for surveying works, and motorists are advised to take a different route.
The road will be closed both northbound and southbound between the R332 Ballygaddy Road Junction and the M17 Kilmore Roundabout.
Full diversions will be in place for the duration of the works.
In other traffic new motorists are being advised to avoid the R344 in the Inagh Valley after heavy rainfall damaged part of the embankment.
The regional route in Connemara has been reduced to one lane of traffic as a result of this damage.
Traffic lights will be in place for the coming days for traffic management purposes.