Just reading all this makes me wonder . Do train drivers in these sections ever have problems with car headlight on full beam. There's a back road near me which is a few feet from the ECML and I must say I always dip my headlights if a train is coming the other way . I dont think the trains can do likewise tho lol .
On the Midland Mainline just south of Market Harborough station, there's a short section of road on the down side where oncoming headlights give you a bit of gip for a few seconds, if you hapen to be approaching a red on the adjacent signal gantry it could cause a problem.