After a string of complaints and accidents, Pattaya workers replaced drain covers and leveled the surface of Second Road.
Suntorn Sompramai, director of the Engineering Department, said the city has not ignored the problems that began after the entire Second Road was resurfaced at the start of the year, but was unable to close the busy thoroughfare during high season.
Repairs were expected to take about a week.
Work began June 2 near Mike Shopping Mall and will work northward.
City workers repair the drain covers on Pattaya Second Road.