Died while driving down the road and wont start back up

Some general advice only since I'm not familiar with your particular vehicle:

Probably you've already looked for anything obvious like no fuel, leaks, overheating, loose wires and so on inclusive of the ignition switch and any of the ignition system accessible spark-plug cables, etc.? If not check those.

But In order of likelihood (my opinion only) Are you sure you have fuel? Just because the fuel gauge says you do doesn't necessarily mean you do, they occasionally lie to you. The recently replaced fuel pump might still be responsible (doubtful, but possible) blockage in the fuel line or filter. (was it running normally before it died or was it trying to stall, acting oddly in any way, making strange sounds or cutting out? Has it been getting hard to start recently?) Those and other symptoms are helpful to mention for better advice.

Oddly,to burn the fuel, if it does have fuel, the car also requires oxygen, so on the off-chance that it's not getting any, check the air-filter, (doubtful, but NOT impossible, I really have seen this before!)

Is your Battery Dead? Mind you, a dead battery doesn't necessarily mean that's the problem, it could be just due to a loose battery connection or inadequate charging from corroded battery terminals, if that's the case try cleaning them, charging the battery and trying it. A bad cable might be at issue (Doubtful but possible, especially if you found heavy corrosion at the terminals, the cables can also suffer that fate. The fact that it died while running and then wouldn't restart might mean the alternator is the problem, so check that if the above steps were not helpful.

If you need help on doing any of the things listed above, a quick YouTube search should find a video showing you how to do it.

Next; Timing, the timing belt may have failed or slipped.

If none of that is at issue you're probably looking at problems of a more serious ilk requiring a mechanic's assistance: faulty senors of different sorts (if so equipped), a blown head gasket, or other internal engine failure(s). Also restricted exhaust can be a cause or failed anti-pollution devices, I don't know what's on your car (or not) so can't go there.

Let us know if this helped, or didn't other folks may have a better idea if needed...

Good Luck!