freeway that is mostly built to interstate standards. Tolled express lanes along the C-470 portion of the beltway with two westbound toll lanes from Interstate 25 to Colorado Boulevard (no interchange), one westbound toll lane from Colorado Boulevard to State Route 121 (Wadsworth Boulevard), and one eastbound toll lane from just west of the Platte River overpass to Interstate 25 are completed and the state of Colorado began collecting tolls on August 18, 2020. Modern day expansion After the completion of C-470 in the southwest, desires for a full beltway persisted in some circles and plans for an extension were created. CDOT did not wish to participate in the building of the freeway extension and left the counties and cities of the metro area to provide funding for the project. The east, north, and northwest portions of the beltway could only be built as tollways. A tollway extension of SH 470 was built to the junction with State Highway 83 (Parker Road) and termed Eastern/Extension 470 or E-470. Subsequently, E-470 was extended to the interchange with I-70 in the east, and later to I-25 in the north. This newly added tollway was built and continues to be administered by a quasi-governmental organization known as the E-470 Public Highway Authority. When freeway interests pushed for the rest of the beltway to be completed, the city of Golden voted to stop all efforts to finish the beltway due to traffic concerns. The city and county of Broomfield constructed an continuation of the E-470 tollway from I-25 to an interchange with US 36 (the Denver-Boulder Turnpike) near Flatiron Crossing Mall. This section of the tollway is known as the Northwest Parkway, and is administered, similarly to E-470, by its own quasi-governmental agency. In conjunction with E-470 (47 miles) and SH 470 (27 miles), the Northwest Parkway brings the total length of the completed portion of the beltway around the Denver-Aurora Metropolitan Area to approximately . The uncompleted portion, from the west end of the Northwest Parkway to the northwest end of SH 470, is along existing streets. In 2007, the Portuguese company BRISA paid $603 million to operate the road for the following 99 years, until 2106. The lease included a clause restricting a "Competing Transportation Facility. This clause was invoked in an April 30, 2008 letter when Broomfield wished to make changes to 160th Ave. In August 2003, CDOT made a compromise