NCTUns is a high-fidelity network simulator and emulator. By using a novel kernel re-entering simulation methodology, it provides many unique advantages over traditional network simulators and emulators. For this reason, since its public release on November 1, 2002, as of February 2, 2009, more than 13,838 people from 130 countries in the world have registered at its web site to download it and these numbers are still fast increasing. NCTUns is open-source and runs on Linux. It can simulate many different types of networks. In this paper, we will present its supports for wireless vehicular network researches. In particular, it supports IEEE 802.11(p)/1609 standards, which are proposed for wireless vehicular networks. More information about this tool is available at its web site at (http://NSL.csie.nctu.edu.tw/nctuns.html).