The main access to the fort is by G.T road from Islamabad or Lahore

From Islamabad
The dual-carriage G.T road takes you past Gujar khan and Sohawa, to the
small town of Dina 130Km away. Just past Dina you will drive over a railway overpass, stay to the right of the road and take the first U-turn to drive back towards Dina. After about 100 meters to your left you will find a signpost, which is indicating towards a black toped road leading to Rohtas Fort which is 8 KM away. Drive on the road to enter into the fort from its first gate, Khawas Khani Gate. keep driving when you are reached in parking area near Sohail Gate.. 

From Lahore
Drive on G.T Road past Gujranwala, Wazirabad and the city of Jhelum. About 10 minutes drive beyond the Jhelum bridge just short of the city of Dina, you will find a signpost to the left  directing you to Rohtas Fort.

For any assistance or in case of any emergency you can approach National Highways and Motorways Police by dialing 130.