>> they're just immense, and they're everywhere. >> in boston, the mayor's office has dropped an app, trying the track and fix the pothole problem. in new york city, crews have filled more than 213,000 potholes this year, an 11% increase over last year. the city is spending an additional $2 million on plugging potholes. in philadelphia, the city has filled more than 11,000 potholes this year, and mechanics are busy. >> cars that are coming in with an influx of suspension problems and blown tires, bent wheels. >> reporter: that is a huge pothole. whoa. we decided to drive into potholes, using a seismograph app to measure the force of impact. that was almost 2g. >> driving along, the jolt you feel from a pothole is much greater than the jolt you would feel from an earthquake. >> one-third of the nation's roadways are listed in poor or mediocre condition, costing american drivers $67 billion a