Pavement

[SunsetOvrC@aol.com]

I have heard of several rides where one must travel over significant 
stretches of pavement.  Because I am cautious, I never do anything but walk 
over sections of pavement and was wondering how much damage it does to a 
horse to go at higher speeds.  I recall one post recently where a woman was 
passed by juniors GALLOPING on the pavement; surely this is not safe for 
horse or rider.  The horse could experience concussion injuries from all the 
pounding, and/or could slip and fall.  I have read some materials that say a 
little bit of conditioning on pavement at the trot is ok and actually 
strengthens the bones of younger horses.  So what is the concensous on 
trotting on pavement?  Ok to do in moderation, or does it always do damage?  
Ok with pads?
Pamela