Some folks are using straps or bungy cords for securing their new digital HD TV installs for road travel.
I thought I would take a few pictures of my new TV install (now 3 years old) for the "travel mode" feature I made. It wasn't hard to do and it is as secure and solid as any I've seen. It also has very easy access to get into the back for cable connections, etc.
You can buy some angle aluminum at Lowes or Home Depot for this job. All that is needed is a small vice, a hack saw, a Drill, a couple of drill bits, a threading tap, a small file to remove burrs and the bolt hardware. I used the same size metric bolts that came with the TV mount kit.
Here is the 32" Sony Bravia HD TV I picked for the install. The TV mounts outside the 'ole previous TV enclosure. An added plus for this install is that it keeps the TV cool that way.
There are two small metric bolts that tighten, or loosen, the TV, under the TV.
The angle bracket attaches to a flat piece of metal that I slipped into a slot and secured to the TV with two small bolts. Also notice how I "flared/opened" the slots for easy "push back" of the TV into it's resting position.
I tightened all the mounts pivot points (3) to the point that they were "snug".
The bracket(s) (2). I used some square tubing because I had it on hand. The angle aluminum, or even flat aluminum would work just as well.
It works great and has many miles of road testing on it.
Good luck on your method of securing your TV's,