Miami-Dade County's $62 million investment in Proterra electric buses has hit a roadblock, raising questions about the future of its public transportation efforts. The county's recent report to commissioners reveals a complex story of reliability issues, warranty failures, and a potential early replacement plan.
A Troubled Investment
Miami-Dade's decision to spend nearly $62 million on 69 Proterra electric buses and charging infrastructure was driven by the desire for cleaner public transportation. However, the buses have faced significant challenges, with approximately 60 of them sitting out of service at Homestead Air Reserve Base, described by transit workers as an 'electric bus graveyard'.
The issues stem from reliability problems, repeated breakdowns, and the difficulty of obtaining replacement parts. This has led to a situation where the county is now seeking federal approval to replace the buses before their expected 12-year service life, potentially avoiding the need to repay federal funding.
Warranty and Service Obligations
The county's troubles with Proterra began after the manufacturer's bankruptcy, when Phoenix Motor took over the transit bus business. Miami-Dade spent over a year attempting to get Phoenix to honor warranty and service commitments, but the company failed to take necessary corrective actions. As a result, the county terminated its contract with Phoenix in April 2026.
A Broader Trend
Miami-Dade's experience is not an isolated incident. Proterra buses have been deployed to over 135 transit agencies across the US and Canada, and many have faced similar challenges post-bankruptcy. Broward County Transit is also seeking relief from the Federal Transit Administration, indicating a potential trend of issues with Proterra's fleet.
Retrofit Efforts and Uncertainty
Despite the challenges, Miami-Dade officials remain hopeful. Mayor Daniella Levine Cava is exploring retrofit options to get some buses back on the road. However, the future of the Proterra fleet is uncertain, with the county continuing to explore options for returning buses to service while seeking federal approval for early replacement.
The county's efforts to address the troubled buses provide a detailed accounting of the challenges faced and the potential solutions being considered. As the story unfolds, Miami-Dade's experience highlights the risks and complexities of large-scale public transportation investments, particularly in the context of emerging electric bus technologies.
