I used the word "sleepers" for the french word "traverse" as suggested by Microsoft Word 2007 asking for standard english translation, using railroad definition and correct english, not americanism
tranverse
feminine architecture traverse beam or girder; ladder: rung; railroad sleeper, Americanism tie; (also chemin masculine de traverse) short cut
But ok, i'll continue with the word "tie".
For electric track, the current wood ties is totally unrealistic. I wonder how far America is in stone age about railroad, but wood isn't used in Europe since 30 or 40 years. Now we use "béton armé", that you could translate as "concrete". It can handle much heavy weight, more vibrations, and it is totally indeformable, so the tracks remains absolutely parallel, that's not the case for wood ties. Wood prevent using tracks for high speed.
And for me, high speed, it's like French TGV, German ICE or japan bullet train. Not 266 km/h, but 300/320 km/h or more (german ICE was validated for 330 km/h in commercial use in the past weeks). France should build a TGV for China in the next years that will be able to run up to 360 km/h then, so there is currently not known speed limit for this type of tracks.
And high speed tracks are absolutely different from classical tracks. You speak about normal electrified rails used at 266 km/h, I'm pretty sure it's not classical rails, but high speed rails. HS rails means a lot of difference in curves and electric system. Train pantos can't get power from the wire at 300 km/h like for 200 km/h. And you need like 20 more power to got 250 km/h to 300 km/h than 0 km/h to 200 km/h. So if you use classical wires and panto for high speed, you'll just bleed the wire because of too much power.
That's not for no reason the LGV needed as much work to be created than the TGV itself. And that's not for no reason Alstom is present on most high speed tracks building sites.
Next, monorail and maglev exists, I know that, you didn't dream. But monorail switchings are almost impossible to design, it need an enormous infrastructure. It's not a limitation of OTTD, but a real life limitation. For maglev, it's possible, but trains must slow down a lot. May be in the future, there will be better systems, but currently not any ingeener have any idea of how to do better. That's why it can't be used for complex network systems, at least for several decades.
And that's why I think more realistic to have more types of classical rails instead of both monorail and maglev. Anyway OTTD is not TTDPatch, so having all of this is possible.
Thus, maglev would never be for goods transportation, as leviation requires a lot of energy, and goods are far too much heavy. Currently OTTD just accepts having a trains using maglev tracks with 20 coal wagons. That's just impossible, even in 100 years : that would requires far much enery as burning of the cargaison of the train !