I've been reading whatever I can on LCL for several years. Information of any sort on this subject is frustratingly scant. You're lucky to have found the MOPAC data you described! There is a yahoogroup just on LCL but it doesn't always have much message traffic.

I can't quote chapter and verse, but I've read some reports that say that most LCL traffic used home road cars and other reports saying the opposite. I suspect there isn't a "one size fits all" approach here. In the situation I'm most familiar with, a small city freight house was primarily exchanging scheduled LCL cars with other on-line freight houses. It seems most likely to me most of these would be home road, especially because the traffic didn't justify separate inbound and outbound houses; thus, whatever cars can in as loads could go out later that day. In cases where a substantial number of LCL cars were coming in from other roads, then clearly you'd expect more road names involved.

Bob Sterner
St. Paul, MN