DALLAS (CBSDFW.COM) – HOV toll lanes are coming to LBJ Freeway and the first phase of construction starts this weekend.

The LBJ Express Expansion is $2 Billion project that will add 13 miles of lanes extending from Irving to northeast Dallas. Four additional miles of expansions will also be built on I-35E, just south of LBJ Freeway. The new lanes will run below or underneath the current freeway in some sections.

The LBJ Express will also include a “cost to cruise” toll road options for users.

The end result is meant to eliminate the congestion for the more than 250,000 drivers who cruise Dallas’ busiest freeway, but until then construction will close off lanes and shut down exits for the next five years. And those lane closures will start Sunday night.

“About Midnight we’re gonna put cones and concrete barriers up from about eastbound from Luna Road to Midway, and then westbound Midway to Josey Lane,” explained Andy Rittler with the LBJ Infrastructure Group, the company financing, designing and constructing the expansion.

Rittler says during the construction there will be four lanes of traffic open, in each direction, during peak commuter hours.

Project organizers say much of the work will be done at night and on the weekends.