Flatiron Flyer

A branching route system is employed, with the backbone of the system being the HOT lanes along U.S. Route 36.[3] High-occupancy vehicles and buses travel free in the HOT lanes, while single-occupancy vehicles must pay between $1.25 to $7.60, depending on time of day, or up to $13.68 without an electronic toll collection pass.[4] The HOT lane will be managed to ensure that traffic will flow at 50 to 55 miles per hour (80 to 89 km/h).[5] Union Station and Civic Center in Denver and Anschutz Medical Campus in Aurora serve as the southern termini, while Downtown Boulder and Boulder Junction are the northern termini.

Given that the Flatiron Flyer travels with other vehicles in the HOT lanes, the lack of street level boarding and alighting, and the lack of an off-board fare system, it has been classified as "Not BRT" by the Institute for Transportation and Development Policy, which promotes construction of BRT systems.[6] This new system has been criticized as bus rapid transit creep.The original FasTracks plan approved by voters indicated that center-line BRT stations would be created to avoid buses exiting the highway and sitting at traffic intersections.[7] However, this plan was shelved and three of the stops were redesigned to use slip ramps instead.

Subsequent plans to give buses the right to use the shoulder as a travel lane during traffic jams required a change in law; RTD buses got the go-ahead in March 2016, and took effect in April of that year.[8][9]

Express service between Boulder and Denver is expected to take slightly under an hour, which is about 10 to 15 minutes faster than current bus routes.[5]

There was some opposition to the proposed consolidation of routes between Boulder and Denver. Buses along the most popular routes would come more frequently under the new service plan, but Boulder Junction would receive less service.[11]

Flatiron Flyer was constructed as part of the FasTracks program, which built six new commuter rail, light rail, and bus rapid transit lines in the Denver metropolitan area.[13]

Widening U.S. Route 36 to accommodate the bus line was a joint project between the Colorado Department of Transportation and RTD, termed the US 36 Express Lanes Project. The highway was widened by 40 feet (12 m) in each direction, adding a high-occupancy vehicle lane, which the buses will use when possible. To accommodate the lanes, several bridges were replaced and shoulders were widened. As part of the multi-modal commitment, a concrete trail was added between Westminster and Table Mesa, the U.S. 36 Bikeway.[14] The project was completed in two phases. The first phase, from Federal Boulevard to 88th Street in Louisville/Superior,[15] took three years (July 2012 - July 2015) and cost $317 million. Phase 2 of the project extended the HOT lanes from 88th Street to Table Mesa Drive in Boulder through a public–private partnership;[16] it opened on January 3, 2016, with toll collection starting in March of that year.[17]

In June 2015, RTD announced the $35 million purchase of 59 MCI D-Series motorcoaches, each of these 45-foot (14 m) buses can carry up to 57 passengers.[18]

In August 2015, the University of Colorado (CU) paid $5 million over five years to place advertisements on Flatiron Flyer buses, with an option to extend for another five years. The deal also included the naming rights for the DIA rail line, dubbed the University of Colorado A Line.[19][20]

Originally, the voter-approved plan called for a 41-mile (66 km) high-capacity commuter rail line running from Denver Union Station to Longmont, passing through North Denver, Adams County, Westminster, Broomfield, Louisville and Boulder.[21] RTD opened the first segment of this rail line, the B Line, from Union Station to Westminster Station — near 71st Ave. and Federal Blvd. — in July 2016.[22] The completion of the originally-planned route from Westminster to Longmont has been delayed until 2044 due to lower tax revenues and higher costs than expected.[23][24] RTD introduced "Flatiron Flyer" as its brand for the US 36 Bus Rapid Transit component of FasTracks, serving travelers between Denver and Boulder.[25][26] As an interim measure until Northwest Rail can be completed, RTD committed to study high-speed bus options in other parts of the corridor as well as the possibility of extending the North Metro Line to Longmont.[27] The consolidation of current express service between Denver and Boulder into the Flatiron Flyer system attracted criticism from Boulder residents, since increased frequencies would be balanced with some service cuts.[28][29][30] Additionally, the ITDP classifies the system as "not bus rapid transit", due to the use of lanes shared with private cars along US 36.[6]

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