Protection for bridge ends or other fixed objects in two-lane two-way operations

Iowa DOT protects the off-end of bridges in its two-lane two-way operations work zones by temporarily placing the appropriate metal beam guardrail treatments. If a metal beam rail does not work, crews use different types of work zone crash attenuators to provide the same protection, only if these end posts are within the work zone clear zone. Work zone clear zones are described in Section 1C-2 of the current Design Manual  on the web site below.