One of the state’s most important roadways is getting a facelift in Dallas County, bringing steady closures.

This weekend, a variety of closures along I-35 are coming up as part of the Phase 2 project reconstructing and widening a section of the highway between I-635 and the Denton County line.

Here’s what to know:

Highway lane closures

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The following segments of I-35 will be reduced to one lane:

Southbound between the PGBT and I-635 from 8 p.m. to 6 a.m. nightly until Sunday, Feb. 15.Northbound between I-635 and the PGBT from 8 p.m. to 6 a.m. nightly until Monday, Feb. 16.

The following lanes will be closed:

Westbound I-635 TEXpress to northbound I-35 from 8 p.m. Sunday, Feb. 15 to 6 a.m. Monday, Feb. 16.All managed lanes (HOV and express lanes) between I-635 and the PGBT from 8 p.m. to 6 a.m. nightly from Friday, Feb. 13 until Sunday, Feb. 15.Exit and entrance ramp closures

I-35 exits to the following will be closed:

Valley View Lane northbound from 8 p.m. to 6 a.m. from Sunday, Feb. 15 to Monday, Feb. 16.

Entrances to I-35 from the following will be closed:

Westbound I-635 to northbound I-35 from 8 p.m. Sunday, Feb. 15 to 6 a.m. Monday, February 16.Eastbound I-635 to northbound I-35 from 8 p.m. Sunday, Feb. 15 to 6 a.m. Monday, February 16.Sandy Lake Road southbound from 8 p.m. Saturday, Feb. 14 to 6 a.m. Sunday, Feb. 15.Frontage roads and crossings

The roads surrounding I-35 will be closed:

All eastbound lanes along Trinity Mills Road from 8 p.m. to 6 a.m. nightly until Sunday, Feb. 15.Valwood Parkway under I-35 from 8 p.m. Friday, Feb. 13 to 8 a.m. Saturday, Feb. 14.Main Street under I-35 from 8 p.m. Saturday, Feb. 14 to 6 a.m. Sunday, Feb. 15.