CH2M Hill and the Central Texas Regional Mobility Authority say they have settled their differences over costs and completion deadlines on a $137-million toll-lane project in Austin.

The authority and CH2M Hill reached an agreement Feb. 16 that the project will be substantially complete this year and substantial completion of northbound and southbound lanes by summer. CH2M Hill "has committed itself to meeting critical milestones to ensure timely progress," according to a statement released by the authority.

The project, called the MoPac Improvement Project, will add toll lanes to an 11-mile stretch between downtown Austin and Parmer Lane.

As part of the agreement, the authority said it would withdraw a notice of default issued to CH2M Hill in December. At the time it issued the default notice, the authority said it had assessed CH2M Hill more than $1 million in damages related to unauthorized lane closures. CH2M Hill will, according to the authority's new statement, seek resolution of outstanding claims through a contractual dispute board process.