Learn two documented controls before combining them in a construction task.
Read the current work assignment
City Construction Simulator 3D describes road construction and operating different vehicles. Start with the active assignment and identify what state the game asks you to produce. The supplier repeats broad claims about realistic infrastructure work but gives no verified construction procedure. Treat the scene as a fictional task rather than practical training for road building or heavy machinery.
Learn what the slider changes
The control record lists WASD or arrows for vehicle movement and the left mouse button for increasing or decreasing a slider. Inspect the actual slider and its label before adjusting it. The source does not say what mechanism the slider operates, so do not assume a bucket, crane or another attachment. Observe one deliberate adjustment and connect it with the visible response.
Combine inputs only after understanding them
Once movement and the slider are clear separately, follow the task's instruction for using them together. If the result is wrong, identify which state differed from your intention: vehicle position or slider-controlled action. This article supplies no tested machine sequence, worksite route or real-world operating advice. It offers a way to make the two documented inputs understandable without allowing the detailed construction story to fill gaps in the actual control information.