You can measure peak acceleration--cars accelerate much faster than buses or trains--or whether you're connected to headphones (not a head-unit). Use of headphones by drivers is illegal in most places.

As for express vs. regular lanes, express-lane cars will have much different distributions than regular-lane cars. Use something like KNN where the distance metric is a weighted sum of Kolmogorov-Smirnov distance between speed distributions and K-S between acceleration distributions (each vehicle is one unit with a distribution of speeds and accelerations).