How to Plan Ahead and Be a Reliable Designated Driver
Last reviewed: 2026 · Driviology Road Safety Education Team
Quick Answer
A designated driver commits, before any drinking starts, to stay completely sober and be responsible for getting the group home safely, which only works if that commitment is made and respected in advance.
A designated driver is one of the simplest, most effective ways to prevent impaired driving, but only if the plan is made before anyone starts drinking.
Planning Before the Night Starts
Decide who is driving before arriving at the event, rather than leaving it to be sorted out later, when judgment about who is "fine to drive" becomes far less reliable.
What the Role Actually Requires
A true designated driver has zero alcohol, not just "a little less" than everyone else, since even small amounts affect reaction time and judgment.
Respecting the Commitment
Friends and group members should support the designated driver’s choice rather than pressuring them to drink "just one," which undermines the entire purpose of the arrangement.