Where a period is a full stop, (just like when you learned in driver's ed to come to a full and complete stop at a stop sign) the semi-colon is the equivalent of the rolling stop that most of us do at a stop sign.  Unless you are quite reckless in your driving, I would not consider the semi-colon a yield.  It's still a stop sign.  It's just a little "softer" than the hard stop. 




The traditional rule for a semi-colon is that it must have complete and independent sentences on both sides of it.  (SV; SV.) As far as I'm concerned, that's very close to (SV.  SV.).  About as close as you can get.

This is why the semi-colon works well with transitions.   Since transitions show a relationship between the two sentences anyway, a semi-colon makes more sense than a period.  However, you can overdo the semi-colon thing.