Here's some information on the design limits of crash barriers. This is mainly about motorways, and perhaps the barriers here weren't to motorway standard, but I think they should have been--although the specification is actually not that strong:
http://www.brake.org.uk/facts-resources/15-facts/513-motorway-crash-barriers
@Oliver Schick started
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Here's some information on the design limits of crash barriers. This is mainly about motorways, and perhaps the barriers here weren't to motorway standard, but I think they should have been--although the specification is actually not that strong:
http://www.brake.org.uk/facts-resources/15-facts/513-motorway-crash-barriers