A Vulnerable Road User could be a pedestrian, cyclist, motorcyclist or horse rider. It refers to anyone using roads without a vehicle around them offering protection.
If someone in a vehicle is in a collision, they have the frame of the vehicle and often other features like air bags and crumple zones to help absorb the force of the crash and provide protection. If a vulnerable road user is in a collision, they are exposed to the full force of the impact. Due to the vulnerability of these road users, drivers should do everything they can to ensure they are not putting them in danger.