The barbs are designed to puncture and flatten tires when a vehicle is driven over them, usually the barbs are hollow to allow air to escape at a steady pace in an attempt to reduce the risk of the driver crashing into oncoming traffic or the surroundings.
The barbs are designed to puncture and flatten tires when a vehicle is driven over them. The barbs are hollow to allow air to escape at a steady pace in an attempt to reduce the risk of the driver. This driver is crashing into oncoming traffic. This driver is crashing into the surroundings.