My first morning in Altamonte Springs, Florida, I was faced with a dilemma: how to travel the two miles from my hotel to city hall without a car. Walking would take nearly an hour in the sweltering June heat. Taking a bus would entail waiting up to a half hour at a stop with little shelter from the forecasted thunderstorms, followed by a looping detour to the local mall. The trip could potentially take longer than walking.

I was on my way to meet Frank Martz, Altamonte’s city manager. For nearly two decades, Martz had fought to overhaul Altamonte’s transit system with a fleet of demand-responsive public busses. He called the plan FlexBus, and it would use custom-designed software to optimize routes for vehicles that riders would order from kiosks or even desktop computers. Martz saw FlexBus as the key to transforming Altamonte, a loose agglomeration of palm tree-lined strip malls and culs-de-sac a few miles north of Orlando, into a thriving and walkable destination....

But the transit landscape had changed since Martz began his quest. In the years before FlexBus was founded, some of Silicon Valley’s most prominent companies had begun offering on-demand transportation reminiscent of Martz’s vision. So just weeks after burying FlexBus, Martz called Uber. His inquiry was blunt: did the company want to make Altamonte the world’s first public transportation system based on ride-share technology?

Martz’s proposal would make the suburb of Altamonte an unlikely test bed for one future of public transit. It would also raise questions about whether such a future can serve everyone equally, and force Martz to navigate between the transparency of public office and the demands of a multibillion dollar company with a penchant for secrecy.