 US 31 then has an intersection with mainline US 431 (5th Avenue) before passing through Franklin Square and crossing the Harpeth River to meet SR 397 and the northern end of US 31 Truck.US 31 then goes through the Nasville suburb of Brentwood as Franklin Road.While in Brentwood, US 31 has three important interchanges with SR 441 (Moores Lane), SR 253 (Concord Road) and SR 254 (Old Hickory Boulevard).