My "emergency" knife is a Spyderco Delica, in the right cargo pocket on my BDUs. I thought about this a few months ago, and switched my clip knife carry from a back pocket to the cargo pocket, as I can reach the cargo while sitting down, but not the back without squirming around. My wife also leaves her CS Recon Tanto in our minivan between the front seats. It's not "secured" as it sits in a cardboard box that we use as the "console", but it sits down out of sight and is also our anti-carjack system!
Matt in Texas