1. Barriers
Barriers are structures or devices placed on or near roads to control, guide, or block traffic, and to protect people, vehicles, and property from accidents or unauthorized access.
- Guardrails - Flexible metal barriers on roadsides or curves to absorb crashes
- Concrete barriers (like step barriers) - Heavy, rigid walls that block or separate traffic on highways or bridges
- Cable barriers - Steel cables that flex to catch and redirect vehicles
- Bollards - Short vertical posts that block or limit vehicle access
- Temporary barriers - Plastic or metal, often used in construction zones
- Crash cushions - Soft barriers placed in front of fixed objects to absorb impact