[3] CTfastrak services run on a 9.4-mile (15.1 km) dedicated busway which runs on an abandoned railroad right-of-way from Downtown New Britain to Newington Junction and alongside the active New Haven–Springfield Line from Newington Junction to downtown Hartford.

[6] Such a trail was not possible on the northern section, where all available room was needed for an access road for Amtrak maintenance vehicles.

The remaining seven stations have basic side platforms and small shelters, with ramps to street level.

[8] As of December 2016[update], twelve CT Transit routes use the CTfastrak busway with a variety of stopping patterns.

[4] The 102 makes the same stops as the 101 but extends past New Britain to Bristol, Connecticut; it operates at a lower frequency than the 101.

Other times throughout the day it enters the busway at Newington Junction station as the 140F and continues to East Street.

[12] Preliminary work estimated a $10 million annual cost of running the various CTfastrak routes and new feeder services.

[13] In October 2019, the state applied for a federal grant to test autonomous buses on the CTfastrak busway beginning in 2020.

The expansion would incorporate many of the BRT features of the existing system, including branded buses, large shelters, real-time information, and frequent all-day service.