[6] The Red Line was retired when the Downtown Transit Center opened, with IUPUI service being covered by Routes 3, 10, and 37, along with 15-minute frequency on Michigan and New York streets.

It ceased operation on September 16, 2012, due to the expiration of the federal grant funding it, leaving local Route 8 to serve the airport.

In 2017, City-County Council approved a voter referendum increasing Marion County's income tax to help fund IndyGo's first major system expansion since its 1975 founding.

[10][11] The first segment to be constructed is phase one of the Red Line, traveling 14 miles (23 km) from Broad Ripple Avenue to the University of Indianapolis.

[14] In February 2020, the corporation announced it would be canceling an order for five battery-powered coaches for Route 39 along East 38th Street due to reliability issues with the BYD vehicles.

IndyGo stated in a press release that the company had not met its contract which required the buses to cover 275 miles (443 km) until recharging, nor did it provide a permanent enroute re-charging solution.

Legislators have proposed withholding income tax money and preventing expansion routes until IndyGo meets its 10% funding goal.

However, IndyGo CEO Inez Evans responded that the corporation had been unable to officially meet the target due to delays in establishing its foundation, which recently received $35,000 in private investment, and stated that public funding cuts could jeopardize its transit plans.

[16] In April 2020, IndyGo postponed system-wide route changes as part of the Marion County Transit Plan implementation due to the COVID-19 pandemic.

[24][25] The bill was dropped after IndyGo and the city government agreed to maintain two lanes in each direction for general purpose traffic in more sections of the route.

Fares on IndyGo services can be paid for with cash, paper passes, or the MyKey reloadable card and app system, which generates a QR code that is scanned at transponders.

When it became the Indianapolis Public Transportation Corporation (adopting the Metro name) in 1975, the New Looks became the workhorse of the fleet, with the agency later adding AM General, GM RTS-II series, GMDD Canada New Look, and Orion I buses to the lineup as the New Looks wore out by the mid-1990s.

These buses were painted white with brown-gold-brown stripes and the "Metro" name next to the exit door (except for the Canadian New Looks, which sported a bold black top around its windows) up until the change to the IndyGo branding in 1997.