........ porous concrete that was used to pave the last few dozen yards of a runway somewhere.
See here for overrruns and crushable concrete. This presumes you have the available space at the airport - not so in this case!
http://www.faa.gov/news/fact_sheets/...fm?newsId=6279
Excellent 8 minute Video here.
http://www.esco.zodiac.com/documents/video/ESCO-lrg.ram
Last edited by forget; 20th Jul 2007 at 11:45.