It's SimCity 2000, and it's making me wonder how fast African Swallow speed would be on a modern computer - I believe that speed was basically progressing time as quickly as the computer could and it was pretty fast even on the 166(?) MHz processor of the Mac I played it on as a kid.
That was a common problem with older games. We found that out when we tried to run an old Command and Conquer have on a Windows XP system and got categorically curb stomped out of nowhere.