GDT > RTD Rider’s Guide > Routes > Route AB – Boulder / Denver Airport
Route , ”, runs from to Central Park Station via .
Map & Schedule
Route operates 7 days a week. Frequency is generally 30 minutes throughout the day, dropping to 60 minutes in the evenings.
Vehicles Used
The route is operated by RTD using MCI D4500CT over-the-road coaches from Boulder Garage.
Ridership
| Year | Route AB | Route AB1 | Route AB2 | Total |
| 2018 | – | 598,000 | 62,000 | 660,000 |
| 2019 | 2,000 | 619,000 | 111,000 | 732,000 |
| 2020 | – | 288,000 | 28,000 | 316,000 |
| 2021 | – | 409,000 | – | 409,000 |
| 2022 | – | 522,000 | – | 522,000 |
| 2023 | – | 601,000 | – | 601,000 |
| 2024 | – | 641,000 | – | 641,000 |
Note: Figures from 2021 include former Route riders.
Current Issues
This route suffers from poor scheduling at ? Station, here buses are timed to depart 3 minutes before W Line trains arrive.
Future Plans
The System Optimization Plan proposes to increase weekday frequency to 15 minutes, evening frequency to 30 minutes and weekend frequency to 30 minutes.
The System Optimization Plan details no proposals to change this route.