Indy Driver Dario Franchitti -- Back On Wheels After 2nd Surgery

Three-time Indy 500 winner Dario Franchitti is rolling again -- just in a wheelchair for now -- but it's a start after his horrific crash earlier this month ... and TMZ has photos of his recovery.

Dario was wheeled out of an Indianapolis hospital today after undergoing surgery Monday on his fractured right ankle.

Dario got seriously messed up -- multiple fractures and a concussion -- during an IndyCar race in Houston earlier this month. His car bumped another one, sailed into the air, and smashed into a fence.

Sources close to Dario -- a 4-time Indy series champ -- tell us he's doing well after surgery and focusing on "getting back on the racetrack" next season.