Report on testing vehicle windscreens
Objects have been deliberately dropped from overpasses into the path of vehicles traveling on high-speed roads.
These incidents pose a risk to vehicle occupants and in some cases have resulted in serious injuries. The area of greatest risk to vehicle occupants is the penetration of objects through the front windscreen.
Testing was initiated and aimed to determine appropriate aperture sizes if screening treatments are adopted on overpass structures.
This would reduce the likelihood of damage from big objects being dropped.
Concrete and steel spherical projectiles were used during testing. This attached report describes what tests were performed and recommends a maximum aperture size.
Report on testing vehicle windscreens (PDF, 2.53MB)
Last updated: 08 June 2009
