MartyD82: Well, it took more than two decades. But thanks to NVIDIA and ATI cards finally giving you the option to add framerate caps to individual games, the Interstate '76 Arsenal is FINALLY 100% playable on modern PC's with very little extra tinkering (at least, for me). :)
Here's what you do:
1. Get the game from GOG.
2. Create desktop shortcuts for "i76.exe" and "nitro.exe" (you will NOT be playing these games through the launcher), right click and go into "Properties", and add the following command line parameter to the end of the file path: "-glide". Do this for both executables.
3. Also, set them to run in "Windows 98" compatibility mode and with 16-bit color.
4. Go into your video card's control panel, create a special settings file for i76.exe. Turn on all the texture filtering and anti-aliasing options (since we're not using dgVoodoo, the game is stuck at 640x480 resolution) and set the maximum framerate to 20 FPS. Do the same for nitro.exe.
5. This is if you'd prefer to play the game at its original aspect ratio, rather than stretched out to 16:9 or 16:10 (and I highly recommend you do, since stretching the graphics makes them very blurry). In your video card's control panel, turn on GPU scaling (details can be found here:
https://steamcommunity.com/.../dis.../0/1608274347725261520/)
6. You are now ready to enjoy one of the coolest PC games of the mid-late 90's. A game that, to this day, has never really been duplicated or outshined.
In other pages someone had worked on a patch of the game that limits framerates to 24fps, higher than that there were physics issues: