&gt; The Caddy performed perfectly, except when it had to merge onto I-395 South and swing across three lanes of traffic in 150 yards (137 meters) to head toward the Pentagon.<p>This is probably one of the most stressful maneuvers you can make on the Capital beltway. Honestly I feel like once we hit critical mass with driverless cars this action will be much more manageable. I and other drivers have to do some real aggressive things to make this work.