This traffic sign with its sign support structure were used in NCHRP 350 crashworthiness testing. This configuration did not pass the test. Subsequently a modified version without the advisory speed plate and with modifications to the sign support structure was developed and successfully tested.

Transwiki approved by: w:en:User:Dmcdevit

This image was copied from wikipedia:en. The original description was:

Traffic Sign: Road Work Ahead

This is an example of a dangerous sign. In a side-impact crash test the advisory plate (it says 62.5 MPH) and the edge of the sign penetrated the windshield and roof of the test car. A safer sign would have stiffer uprights, no advisory plate and the warning light would be moved to the point of the sign to spread the impact force.

From:

• Page: http://safety.fhwa.dot.gov/roadway_dept/road_hardware/nchrp_350/catg2.htm archive copy at the Wayback Machine
• File: http://safety.fhwa.dot.gov/roadway_dept/road_hardware/nchrp_350/images/michsign1.jpg archive copy at the Wayback Machine

This image is a work of a United States Department of Transportation employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain. English ∙ Español ∙ 日本語 ∙ +/−

w:en:Category:Traffic signs