If you buy one children's book about trains, this should be it!
My three-year-old son is a big fan of anything with wheels and loves trains. We have Thomas books, The Little Engine that Could, Tootle, nonfiction books about trains, fiction books about trains, etc., etc.
This book is the family favorite; it has been for months and months. Simple, poetic language is extremely effective here to convey the feeling of building anticipation associated with waiting for a train to come. I haven't seen any other books that convey that feeling half so clearly. "RED ON--red off" is such a memorable way to describe flashing signal lights that my son invented a little game where he winks one eye, then the other, saying, "Blue on, blue off." When he drives his pedal car through a puddle, he says, "It splished through the puddle!"
The illustrations wouldn't necessarily draw my attention on their own, but they do fit really well with the text.
Country Crossing is a book I don't mind reading repeatedly, and I don't think my husband minds either. It's especially great for bedtime. I can't recommend the book highly enough!