JULIE CARR SMYTH

Evan Burroughs has spent eight years touting the virtues of an Oregon pilot program charging motorists by the distance their vehicle travels rather than the gas it guzzles, yet his own mother still hasn’t bought in.

Margaret Burroughs, 85, said she has no intention of inserting a tracking device on her Nissan Murano to record the miles she drives to get groceries or attend needlepoint meetings. She figures it’s far less hassle to just pay at the pump, as Americans have done for more than a century.

“It’s probably a good thing, but on top of everybody else’s stress today, it’s just one more thing,” she said of Oregon’s first-in-the-nation initiative, which is run by the state transportation department where her son serves as a survey analyst.

Burroughs’ reluctance exemplifies the myriad hurdles U.S. states face as they experiment with road usage charging programs aimed at one