PURPOSE
  HIGHWAY:   (-0.842, 0.027)
  AQUEDUCT:  (-0.284, -0.083)
  RR:        (0.210, 0.006)

MATERIAL
  HIGHWAY:   (-0.020, 0.013)
  AQUEDUCT:  (-1.824, -0.023)
  RR:        (0.255, -0.032)
  WALK:      (0.546, 0.210)

