Todd Harrell -- 3 Doors Down Bassist Free On Bond In Vehicular Homicide

3 Doors Down bassist Todd Harrell is back on the streets after posting $100,000 bail this afternoon on charges including vehicular homicide while intoxicated.

Harrell was arrested late Friday night following a deadly crash in Nashville, TN ... as TMZ previously reported. Police say the 41-year-old was speeding when he clipped a pickup ... whose driver was not wearing a seatbelt and died in the hospital.

According to the police report, Harrell seemed impaired and admitted he'd been drinking and taking the prescription painkiller Lortab and Xanax. Deputies said they found more pills -- including Oxycodone and Oxymorphone -- in his sock during booking.

He was charged with vehicular homicide and bringing controlled substances into the jail ... and has a Thursday court date on the schedule.