Right of Way

Is it legal to obstruct a right-of-way? We have right-of-way to our neighbor's driveway as our home is situated behind theirs. They often park one or two cars on the side of the driveway making it inconvenient for us to get past. The cars are parked in the area designated as part of the right-of-way. Can they do that?
Thanks for your advise. Pittsburgh, PA

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Sonya:
Is it legal to obstruct a right-of-way? We have right-of-way to our neighbor's driveway as our home is situated behind theirs. They often park one or two cars on the side of the driveway making it inconvenient for us to get past. The cars are parked in the area designated as part of the right-of-way. Can they do that?
Thanks for your advise. Pittsburgh, PA<HR></BLOCKQUOTE>

No, as the right-of-way should be in your favor and clear for ingress and egress.