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Audible buzzer confirming operation of hazard or beacon circuits. Required by many UK local-authority vehicle specifications for safety confirmation.

Shaped inlet improving air entry and reducing turbulence at impeller eye.

Switch panel with back-lit legends for night use. Improves operator visibility and reduces the chance of incorrect switch selection.

Relay controlling indicator flash rate and lamp load detection. Essential for correct operation when switching to LED units.

Adjustable vanes regulating air volume to the fan.

Direct-reading thermometer inserted into binder tank for cross-check.

Side-mounted amber lamps replicating the main indicator flash. Improve visibility for passing traffic during sweeping on dual carriageways.

Heated air drying beads before application.

TM truck protecting convoy from impacts.

Tower lights indicating machine states.