Grand Rapids Dip Drunk Driving

Some drunk driving studies have found that drivers with a blood alcohol concentration between 0.01% and 0.04% appear to have a slightly lower accident risk than completely sober drivers. Researchers call this odd pattern the Grand Rapids dip, after an early landmark study that reported it. The effect does not mean drinking makes people safer behind the wheel; instead, analysts view it as a quirk of statistics, influenced by factors like who chooses to drive after drinking very small amounts and how data are collected. The Grand Rapids dip now serves as a reminder that raw numbers in safety studies can sometimes hide confusing or misleading patterns.

Previous Fact Next Fact