It is easy to get to Royal Thimphu College from anywhere in Thimphu by taxi. You should mention Royal Thimphu College (RTC) and ask the taxi driver to confirm the price before getting in - it should be no more than Nu. 250. It will be about a 20-30 mins drive from the town. When coming into the college, the vehicle can go through the main gate and drop you at the second parking lot on the left once you're through the gate. Public transportation is also available (Transportation Schedule).