Channelizing devices — North Dakota Permit Test

Barricades, vertical panels, drums, cones and tubes alert drivers to conditions in work areas and guide them safely through the work zone.

Lanes in a work zone shift and narrow, and these devices show the safe path where the old lines no longer do.

Barricades, vertical panels, drums, cones, and tubes are the most commonly used devices to alert drivers of conditions in highway and street work areas and to guide drivers safely through the work zone.

The diagonal stripes on a barricade or vertical panel guide the driver toward the direction traffic is to pass.

Reading the stripes tells you which side of the barrier to go before you are close enough to hit it.

The diagonal stripes on the barricade or vertical panel guide the driver towards the direction to which traffic is to pass.

Stripes on a barricade or panel that slope downward to the left mean keep to the left.

Going the wrong side of a barricade can put you into a closed lane, a hole or a work crew.

Conversely, stripes sloping downward to the left mean keep to the left.

What are barricades, drums and cones used for in work zones?

To alert drivers and guide them through. Lanes in a work zone shift and narrow, and these devices show the safe path where the old lines no longer do. North Dakota Noncommercial Driver License Manual, p.13: “Barricades, vertical panels, drums, cones, and tubes are the most commonly used devices to alert drivers of conditions in highway and street work areas and to guide drivers safely through the work zone.”