As I'm sure most of you know by now, the rescue vehicle requirement for this mission is far too high. Hampshire, the county I play in, has 3 such vehicles for the whole county and other counties don't have even that many.
I have two suggestions regarding this.
1) Remove the rescue requirement for Cyclist struck by HGV incident. The other required units would be better described by someone who knows of the standard response to that call.
2) Implement a Cyclist Trapped under HGV call. This would require a rescue vehicle but only the one.
Think about it. If a partial building collapse only needs 2 rescue vehicles then a cyclist being hit by a lorry wouldn't need more.