Using clipless pedals on the road is alot easier than on a MTB bike. I'm a roadie (and a CAN Bike instructor) who just got back into MTBing after a 16 year absence.
When I got my first set of clipless (Onza HO), waaaay back before dirt was invented, I had fallen over twice (on road). I HATED the things for the first week, but now all 4 of my bikes have clipless, even my MTB. I'll never go back to clips and straps or platforms. Although I see alot of the FS MTBers use platforms, probably needed for the tricks they do.
Anyway, trouble is, I would stop, THEN try to unclip. Not wise. The big secret to clipless pedals is to unclip just before you stop. Unclip your right foot when you are about to stop so that when you put your foot down, on the curb side of the road, your bike is leaning away from the normal flow of traffic (just one small measure of safety). Plus if you should happen to fall over you'll (hopefully) fall in that direction, again away from traffic. I don't recommend doing track stands, BUT I see people do it and quite successfully, BUT there is still a chance you could fall. Unclipping and putting your foot down at a stop sign or red light tells motorists that you have indeed stopped and you're not 'going to do something crazy'.
I find that clipless offer better control for powering out of a situation, turning, popping over obstacles, etc.
That's about all I CAN say about clipless on the road other than making sure they are in good repair and lubricated.
Hope that helps.