Vacuum Truck at a Utility Dig
A specialized vacuum truck works beside a utility trench on a city street near a large pipe and a safety barrier.

A4 format (portrait), black outlines on a white background · for home and classroom use
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Vacuum Trucks at Urban Utility Sites
A vacuum truck operates along a city street next to an open utility trench. The specialized vehicle stands positioned near a large utility pipe and a high-visibility safety barrier.
How Hydro Excavation Vacuum Trucks Work
Vacuum trucks use high-pressure water jets and powerful suction hoses to clear dirt away from underground utility lines without damaging fragile pipes or electrical cables. This technique, called hydro excavation, stores liquid mud inside a large tank mounted on the truck chassis. Using air suction is much safer than digging with sharp metal excavator buckets near live power lines.
Colors of Municipal Utility Trucks and Streets
- Vacuum truck tank: Bright white, yellow, or dark green
- Suction boom arm: Dark gray metal with flexible black hose
- Utility safety barrier: Bright orange and white reflective stripes
- Utility pipe: Bright blue for water or yellow for gas
- Street pavement: Charcoal gray asphalt with painted white lane lines





