Route 1 southbound in Scarborough reopened Friday, a day after a water main break closed the road entirely.

A southbound lane of Route 1 between Hillcrest Avenue and Pleasant Hill Road reopened after 8 a.m. Friday, according to Scarborough police. Northbound lanes reopened overnight.

Southbound traffic is reduced to one lane for about 250 feet from Pleasant Hill Road before it opens back up to two lanes. That traffic pattern will remain into early next week as crews make final repairs, said Michelle Clements, water district spokeswoman.

The Portland Water District reported the break around 12:45 p.m. Thursday. The water main break and road closure led to major traffic backups in town, according to Scarborough police.

Clements said some customers’ water service was affected, but was restored overnight.