Teenage drivers with attention-deficit/hyperactivity disorder (ADHD) are at considerable risk for negative driving outcomes, including traffic citations, accidents, and injuries. Presently, no efficacious psychosocial interventions exist for teenage drivers with ADHD. The Supporting a Teen's Effective Entry to the Roadway (STEER) program is a multicomponent intervention that was developed to help families with a teenager with ADHD negotiate the transition independent driving. The present report includes outcomes from 7 teens with ADHD who enrolled in the 8-week program. Using a multiple baseline design across participants, teens had driving behavior continuously monitored using on-board monitors that measured driving behaviors (i.e., hard breaking, speed), and the parents and teens reported on driving-related impairment each week. Results indicated promising effects across participants, though there were individual differences in treatment response within and across participants and measures. The STEER program was viewed as acceptable to participants as all families completed the STEER program and reported it to be a palatable intervention.