Gensets didn't work. EMD 4-axle yard locomotives are aging, and safety cabs can't be adapted. What next for yard power? ECO rebuilds or...?
Export locomotives- What have EMD and GE built since 2000 or so (when the traditional G and U/C series production generally ended), and for where? What are their current export models?
Along with that- NRE rebuilds and new locomotives built to EMD G-line specifications- what and where?
Siemens Chargers- who and where, and different specifications between the units as well as coverage of testing- ie Brightline nose cone and CADOT rear Bilevel fairing.
How have the Tier IVs fared so far?
Locomotive rebuilding programs at BNSF/Progress Rail and Norfolk Southern.
Modern locomotive production phases.