"Don Tuite" wrote in message
...

Other folk's answers seem to be assuming commercial IFR traffic. In
my experience in general aviation VFR, the assignment is based in part
on where you are when you first call in. Based on that, you'll get
assigned the base or downwind entry that involves the least
maneuvering.

(Sometimes, as is the case at Palo Alto, in California, one runway may
have traffic patterns on each side. Which one you're assigned depends
on where you're coming from.)

For practicing touch and goes, instructors with lower-time primary
students may request the longer runway.

The airports I've flown from will run T&G's from one (usually the shorter)
then shift you over to the other for your full stop.


--
Matt
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Matthew W. Barrow
Site-Fill Homes, LLC.
Montrose, CO