Traffic patterns on east Main Street, from Preston Road to Custer Road, will continue to shift as road construction moves forward, according to Texas Department of Transportation officials.

The project to widen the road from two lanes to six lanes began in June, and it is expected to be completed summer in summer 2015, said Michelle Releford, public information officer of construction for the Dallas TxDOT district.

"This was just a typical case of the city outgrowing the highway," Releford said. "As of Nov. 1, 2013, Frisco has a population of 135,920, up from 116,989 in 2010. It is one of the fastest growing cities in the nation, and a two-lane, two-way FM 3537 [Main Street] was not able to handle the current traffic volumes, thus prompting the need to expand the roadway."

The project will be broken up into three phases of a traffic control plan, Releford said.

In the first phase, an asphalt detour on the northern side of the westbound lane is being constructed so traffic can continue to flow while construction takes place on the eastbound lanes.

In phase two, the traffic will change onto the newly constructed eastbound lanes.

Once construction is complete on the westbound lanes, the rest of the road work will take place in the median, allowing traffic to flow back onto the east- and westbound lanes.

Releford said TxDOT is working with city traffic department officials on the project.

"TxDOT is in constant contact with the city of Frisco, and we participate with them and the contractor in weekly coordination meetings to resolve any issues or concerns they may have regarding the city of Frisco, relating to FM 3537 and the traveling public," Releford said.

TxDOT informs the city of traffic switch information, which is then relayed by city officials to inform Frisco drivers. Releford said digital information boards with traffic information are placed at the road project before any changes.

Releford said although the traffic switches are planned months in advance, because of weather and unforeseen issues, exact dates are a moving target. The dates are communicated to city of Frisco officials as soon as possible.

TxDOT is funding about $23.8 million for the road, which is the majority of the cost. The city of Frisco is contributing about $2.75 million.