The South Shore line will have its four millionth passenger aboard Tuesday or Wenesday of this week.
A huge milestone for the South Shore railroad is on its way.
For the first time in almost 50 years the four millionth passengers for 2006 will board the train this week.
The South Shore is expected to reach the milestone Tuesday or Wednesday.
Officials will have a much better prediction after weekend rider ship totals come in.
The last time more than four million riders took the South Shore was in 1957.