When it comes to ATV safety, riders must be aware of the laws in the state of Texas. Many operators, including minors, ride them not only on private land but along the side of highways as well. DPS spokesman Greg Sanches says that ATV's are illegal on any kind of public roadway. In fact, ATV's can't even be ridden on the shoulder or grass beside the highway. If you are caught riding your ATV on the highway, you could face up to a $500 fine.