Drivers traveling on US 183 in North Austin should watch for nightly lane closures through May 20 as the Texas Department of Transportation continues work on new flyovers connecting the highway to I-35.

TxDOT will close the northbound US 183 main lanes and frontage roads on an alternating basis beginning May 17 and ending May 20, the state agency said in a May 14 news release. The full lane closures will begin at 9 p.m. and last through 5 a.m. nightly.

During the northbound US 183 main lane closure, drivers will be directed to take a detour on the frontage road. Vehicles will have to use the I-35/Lamar Boulevard exit and follow the frontage road to enter US 183 after Georgian Drive.

US 183 frontage road traffic will be detoured onto the US 183 main lanes. Drivers will have to take the Norwood Park Boulevard entrance ramp and use the main lanes to get to the Ohlen Road/Payton Gin Road exit.

The state is closing these roadways throughout the week as it begins to pour concrete on a new flyover connecting northbound US 183 to northbound I-35, according to the TxDOT news release.

This flyover will be the last newly constructed ramp at the interchange between the two highways. TxDOT expects this new flyover to open sometime this fall, according to Brad Wheelis, public information officer for TxDOT. Earlier this spring, TxDOT debuted the first two new flyovers constructed as part of the project that connect southbound I-35 to both directions of US 183.

TxDOT also recently demolished a portion of the existing flyover connecting northbound I-35 to northbound US 183. The ramp will be reconstructed over the next four months to reduce the incline. An existing detour around Rundberg Lane in North Austin is open for drivers trying to access northbound US 183 from northbound I-35 during the reconstruction of the ramp.

State crews began construction on the $124 million flyover project in January 2018. According to TxDOT materials, construction at the interchange is expected to fully wrap before the end of 2021.