constructed at ground level

constructed at ground level

an upward slope or grade (as in a road)

an upward slope or grade (as in a road)

an upward slope or grade (as in a road)

an upward slope or grade (as in a road)

an upward slope or grade (as in a road)

an upward slope or grade (as in a road)

an upward slope or grade (as in a road)

(cryogenics) the lowest temperature theoretically attainable (at which the kinetic energy of atoms and molecules is minimal); 0 Kelvin or -273.15 centigrade or -459.67 Fahrenheit