MADD and the ignition interlock boom (1980s–2000s)
Mothers Against Drunk Driving pushed states to require ignition interlocks for DUI offenders. By the 2000s, most states had interlock laws, creating a national network of installers based in auto and car-audio shops.
Thousands of court-ordered interlock installs were done at shops like Car Audio SJT.
Interlocks became a standard DUI penalty, and installers settled into ordinary commercial spaces.
Explains why 720 Bastrop Hwy hosts three interlock providers inside a car audio shop, and why a new beer-and-wine seller at the same address is an unusual pairing.
