Table 4 also shows whether respondents who drove after using marijuana or drinking heavily, did both, or did neither received a ticket or warning in the past 12 months and whether they had been in an accident in the past 12 months. Students who reported driving after smoking marijuana, drinking heavily, or both were significantly more likely than students who did neither to have received a ticket or warning for a moving infraction in the past 12 months and were significantly more likely to have been in an accident. However, the 3 groups did not differ significantly among themselves; 42% to 44% received a ticket or warning, and 27% to 32% had been in an accident. In other words, those who reported driving after smoking marijuana but not after heavy drinking were not significantly less likely to have received a ticket or warning or to have been in an accident than those who drove after drinking but not after using marijuana. The likelihood of being in an accident did not differ between these 2 groups even when we combined all data from 2001 to 2011.