Cut and fill
You see the ground from the side, with a bright line where the road must go. Dig away the ground above the line (a cut) and build up the ground below it (a fill).
Gradecraft
Run excavators, dozers and dump trucks through a broken valley. Cut, haul, fill, compact and pave a road before the storm undoes it.
Haul and pack
Dump trucks carry the dug soil from the cut to the fill. A roller then presses each layer firm, and soil that is too dry or too wet will not pack.
Beat the storm
An inspector checks your road, then sends a test storm over it. A road built wrong washes away, and you rework it.
The game saves on the server as you play. A job pauses when you leave, so closing the tab never advances the weather.