Unacceptable Roadside Barriers

Many installations use inappropriate barrier devices to shield obstacles. These devices may shield the obstacles, but they do not protect the motorists. Devices such as fences, utility poles, bollards, sign posts, rocks/boulders, and rope do not provide adequate protection and in some cases, these devices are obstacles themselves. Crashworthiness of a barrier is considered acceptable only if conditions given in the AASHTO Roadside Design Guide are met.