One under-discussed detail of Constantine’s Palmer Prospect has been transportation—and it’s a huge deal. If you think traffic is bad now, just wait. Remember, the Haines Highway will be the mine’s haul road. This means a steady stream of 40-ton tandem trailer trucks hauling concentrate year-round, all the way from Mile 35 through town to the port and back again. These are big, long, heavy rigs that will certainly affect traffic flow, roadbed wear, and…