In 2009, the City of Fairfax partnered with Montgomery County, Maryland, in the purchase of new buses.

As a result, six 35-foot, low-floor Gillig Hybrid buses were added to the fleet in August 2009.

In 2020, CUE stopped collecting fares to reduce passenger contact during the COVID-19 pandemic and remained zero-fare after that point.

In January, 2022, the City Council approved a plan to formalize a 3-year zero-fare pilot program that would make CUE free to ride through June, 2025.

[7][8] In Spring of 2022, CUE was awarded a Transit Ridership Incentive Program grant from the Virginia Department of Rail and Public Transportation that allowed the City to extend the pilot program for an additional year, making CUE free to ride through June, 2026.