The Tuam Bypass will be reopening earlier than originally planned after motorists have experienced significant delays this week.
The road has been closed since Sunday night to allow for emergency resurfacing works to take place.
This has caused significant traffic disruption and tailbacks, with motorists rerouted through Tuam itself.
The road has been temporarily reopened today for rush hour traffic from 3pm to 8pm.
After this, it will close again this evening to allow for these roadworks to be completed.
The roadworks are expected to be completed by 10pm on Wednesday night, after which the road will reopen.