The use of the terms shift lane and merge lane can be confusing with the frequent abbreviations SL and ML for sideline and mainline. I changed most occurrences of SL and ML to sideline and mainline in this article to disambiguate, but we might want to come up with different terms for shift lane and merge lane. --Strstrep 16:35, 7 July 2007 (UTC)

IMHO, the SML-style failes on heavy (!) traffic on the ML. The trains are spending to much time to switching the line, blocking other trains on these lines and blocking so the whole hub. And all this to free a line which can be joined by a Sideline. I guess this loadbalancer can be used until medium to medium-heavy traffic, not at heavy traffic. --Progman 16:18, 25 July 2007 (UTC)