National Highway 28 starts at the junction with National Highway 31 near Barauni and passes north-west through Samastipur, Muzaffarpur, Motipur, Mehsi and Chakia, turns westwards at Piprakothi about 10 kilometers before Motihari, again becomes north-west bound near Gopalganj and leaves the state past Kuchai Kot to enter Uttar Pradesh.