- Trunk Highway 12 is added to the Twin Cities Federal Aid Interstate System.
- Minneapolis Planning Commission examines a distributor road between the Hawthorne Interchange and Washington Avenue to better connect Highway 12 to downtown streets.
- MPC recommends parking to directly connect to inbound traffic.
- MPC commissions “Metro Center 85” plan, which endorses fringe parking facilities to mitigate traffic congestion and maintain walkability in the urban core.
- A site plan shows the location of the three ramps, then called the Third Avenue Distributor Parking Garages, in their current location.
- The Minnesota Pollution Control Agency releases a compliance plan to achieve carbon monoxide ambient air quality standard.
- The plan calls for the development of 7,000 off-street parking spaces served by micro-transit and skyway connections to bring travelers to the central business district.
- Minnesota Highway Department approves garage location.
- Federal Highway Administration approves building garages as part of the I-394 system.
- Conflict from community advisory panels and community pushback over the I-394 construction stalls the project.
- Concerns are raised of revenue losses from expansion of the right of way and the effect of noise from the highway.
- Metropolitan Freeway Moratorium Coalition forms with support from the Sierra Club. As the oil embargo of 1973 continues to unfold, the downsides of completely car-dependent transportation landscape become more apparent to the public eye.
- Minnesota state legislature halts funding for planning and construction efforts. By 1976, the legislature agrees to resume funding on the condition that no more than six through lanes be built.
- Construction on I-394 and Third Avenue Distributor begins with the High Occupancy Vehicle or carpool lanes and incentives for HOV travel.
- The Transportation System Management Plan for Interstate 394 outlines the design and operation of a diverse travel corridor.
- FHWA provides MnDOT with the Maintenance and Operation Plan for the I-394 Third Avenue Distributor Garage A, Garage B and Garage C.
- The State of Minnesota signs agreement with the city of Minneapolis to manage the Third Avenue Distributor Garages.
- The original 20-year term starts July 29, 1989, and ends June 30, 2009, with three 10-year renewal options.
- Third Avenue Distributor, or TAD, garages are completed.
- Metro Transit (then called MTC) operates bus layover and passenger waiting areas in Ramps A and B.
- Carpool and vanpool parking discounts offer reduced price monthly carpool contracts for commuters coming from the west on I-394 and westbound I-94.
- Area private parking operators file complaint with the FHWA that SOV vehicles are taking advantage of the discounted rate.
- Employee monitors are placed at all ramp entrances during peak commute times to ensure vehicles entering the ramps have at least two people or pay the daily rate.
- Despite further discounts and extra incentives, the extra layer of verification lead carpool contracts to drop by half.
- The ramps are branded as the ABC Ramps.
- Construction for the Twins baseball stadium begins.
- Event revenue at the ramps increases from 10 percent to over 30 percent.
- All six bus lobbies are used for the first time.
- All the ramps fill for the first time during Twins weekday daytime games.
- $17 million ramp improvements include street level entrances, skyway connecting Ramp B to Target Field, enhanced signage to help game-day visitors, bicyclists showers and bicycle lockers
- Monthly carpool contracts continue to decline due to changes in travel behavior and demographics.
- MnDOT and City of Minneapolis look at ways to develop new programs to reduce Single Occupancy Vehicle travel.
- Electric vehicle charging stations are added to Ramps A and B.
- A lighting retrofit project includes switching to energy-efficient LED lighting.
- New security measures result in a 64 percent reduction in reported incidences.
- The University of Minnesota studies travel behaviors of ramp users, who said they want flexibility in their travel options.
- The solar garden opens on the top of Ramp A, generating solar energy to subscribers.
- A new carpool parking rate structure includes lifting a geographic restriction and allowing people to take advantage of reduced parking rates regardless of where they live outside the downtown core.
- Mobility Hub added to ABC Ramps’ name, reflecting the transportation options available at the ramps.