For what it's worth, I found OpenStreetMaps and the Open Source Routing Machine to be sufficient for our purposes.

If you don't want features like real-time traffic awareness, it's worth investigating the open source tooling. It can save a LOT of money.

I think real time traffic awareness is exactly what the poster wanted, but yeah it seems like people who don’t need that would be better off using OSS where possible.

Yeah, unfortunately I'm not aware of any open/free sources of real-time traffic data.