Driverless taxis are ubiquitous and complementary to PRT. They are comparatively cheap but more expensive then PRT which has replaced many bus services. Many people took the operating companies' offer to trade-in their cars and invest in taxis and PRT services for which they get a big discount.
Unlike the 20th century PRT systems that had their own track, PRT in towns now runs mainly on roads. Battery-powered podcars recharge automatically while waiting to pick up passengers. Pods have a menu of destinations as in a lift. They have seats for 4-8 people, with space for buggies, wheelchairs, luggage, etc.
At boarding platforms there are usually a few waiting. At quiet times they may leave with only one person in them, but at busy times they normally load till almost full.
The main capital cost is in the podcars and the control system. Adaptations to the roads are often made as part of a general improvement scheme.