Make sure you have installed ROS Indigo
Ubuntu 14.04
Create a catkin_ws
copy the content inside catkin_ws from git's folder catkin_ws
go inside catkin_ws
$ cd catkin_ws
$ source devel/setup.bash
$ source src/autorally/autorally_util/setupEnvLocal.sh
$ roslaunch autorally_gazebo autoRallyTrackGazeboSim.launch