New Jersey Transit ordered their first AL45DP in 2008. The first of the Tier 3 locomotives were delivered in 2011.

NJT ordered 25 more ALP45DP locomotives in 2017 and 2020. The first of the new batch of now Tier 4 locomotives left the factory in Kassel, Germany in December 2020. Currently more locomotives are delivered.

The leave the factory as road transport to Hamburg as their axle loads (32 metric tons) are to high for the German tracks (max 22.5 metric tons). https://www.dvz.de/fileadmin/user_upload/21b027BXXL1_UT_Bombardier_Kasse...

There are a significant number of discussions going on over on this specialized forum. One that caught my attention basically discusses NCE system which is the one I chose long ago based on recommendations from users up in the DC/Balt region that was dominated by Digitrax early on.
https://groups.io/g/NCE-DCC/topic/future_of_nec_redux/86423689

I have 2 Athearn Blue Box dummy locos i want to put behind my 2 locos at our club. In order to do that i need to replace with metal wheels. I suppose i could just use the ones with gears, but expensive. Both have 6 wheel trucks. Ive looked on several sites with no luck. Anyone have any sources?!

Thanks 

Another question for you real world railroaders. Given a siding serving two or more industries such that the local freight might have to pull cars from the nearest or first on the siding to serve the furthest or last on that same siding. Also realizing that freight trains didn't run on tight schedules, my question is: How was/is the movement of the cars on the siding coordinated? Obviously the cars closest to the siding turnout have to be unpopulated and secured so they can be moved then the engine arrives to serve the industries further down.