I remember reading the book "Inside Electronic Game Design" (Arnie Katz w. Laurie Yates, 1996) and in the book, a sample proposal game was used from June 15, 1995 called "Highballin': Electronic Model Railroading." In the Appendix under the game title, it says "Design Proposal Submitted By Subway Software (Arnie Katz, Bill Kunkel, and Joyce Worley)."
If Bill Kunkel is in the forum, I'd like to ask if the game was ever completed and published. I read over the design proposal and it makes you imagine what this game plays like as a completed product. The samples are very well laid out and it makes me wonder if the product was actually done.
I know there have been other railroad games that have come out in the past(Railway Tycoon and A-train come to mind), but was Highballin' ever completed as a playable product?