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Gauge showing skirt wear limits.

Small roller at the front of the suction head that follows surface contours. Prevents the head from digging into uneven tarmac.

Field test using graded sand to determine macro-texture depth. Required on UK trunk-road surface-dressing sites to verify skid resistance.

Individually controlled valves for neat start/stop of spray lanes.

Heavy-duty clip securing flexible suction hoses to duct flanges. Stops vibration-related leaks under high vacuum pressure.

Fixed points used to align long lines.

Valve isolating bar for maintenance.

Opening under the nozzle where air velocity captures debris.

GIS-optimised route for city sweeping.

Solenoid valve controlling each spray-bar section individually. Enables accurate binder control at varying carriageway widths.