function solve ([speed, area]) {
  let areas = {
    motorway: 130,
    interstate: 90,
    city: 50,
    residential: 20,
    getOverSpeed (speed, area) {
      return speed - this[area]
    }
  }

  let overSpeed = areas.getOverSpeed(speed, area)

  if (overSpeed > 0 && overSpeed <= 20) {
    console.log('speeding')
  } else if (overSpeed > 0 && overSpeed <= 40) {
    console.log('excessive speeding ')
  } else if (overSpeed > 40) {
    console.log('reckless driving ')
  }
}