Thank you — that’s great to hear!

Thanks for posting your article. Very interesting to read, and explained in a simple way!

In Train Fever we use both Bézier curves and arcs. Especially for tracks we use arcs. As you explain, for each choice there is a number of advantages and disadvantages.

Finding intersections and offsetting curves are the biggest challenges. For intersections of Bézier curves, we use numerical functions which work very well in practice. It would also work with converting the curves in multiple line segments of course. For offsetting Bézier curves, we actually evaluate the center Bézier curve and add the offset afterwards.

1. Well, yes, but buses pollute the air right outside my window. About powerstations – it would be gas power, or hydro power, or atomic power – it more ecologic than diesel on city street. 🙂 Moreover, electricity is cheaper than fuel.

3. Trolleybuses more reliable than buses, just because trolleybuses has less intricate details. Electric motor is much simpler than a diesel, moreover trolleybuses don’t have transmission: just motor, cardan, differential, wheels. About electrical equipment – before the advent of transistors and thyristors (80’s) it very simple and is repaired with a sledgehammer. 🙂
About overhead wiring – it does not affect the reliability of the trolleybuses.)

4. Well, about less standardized vehicles – in one network (city) similar models of trolleybuses are generally used, so it quite standardized.
About overhead wires: it quite expensive during construction, and, of course, need to maintenance. But as a result maintenance of trolleybuses (vehicles + wires + electricity) is cheaper than maintenance of buses (vehicles + fuel).
Generally, cost goes like this: network launch – 1. Bus (cheaper), 2. Trolleybus, 3. Trams; network maintenance – 1. Tram (cheaper), 2. Trolleybus, 3. Bus.

Sorry for my bad English, just I live in ex-USSR Minsk, city with the 2nd trolleybus network in the world. 😀

While I am also looking forward to a potential trolleybus-DLC, I want to clarify some of your statements.
– Trolleybusses are in general not more ecological than diesel busses. While they are more quiet and dont produce local emissions, they do produce emissions at the site of energy production (think coal powerplant). They are also less efficient in raw energy conversion.
– They are more dynamic considering acceleration.
– They are not necessarily more reliable due to the complex overhead wiring.
– The overhead wires and less standardized vehicles also lead to higher maintenance cost over the diesel bus (http://de.wikipedia.org/wiki/Oberleitungsbus#Betriebskosten.2C_Energieverbrauch_und_Rekuperation).
Other than that they are of course more attractive and would make a great addition to the game!

Agree with you, I’ll very wait DLC with trolleybuses too! 🙂 Trolleybuses not only more ecologic than buses, but and more dynamic, reliable and cheap to maintain.
Moreover, first bus with ICE (Benz, 1895) appeared later than first trolleybus (Siemens, 1881) and tram (1881, too).

“The current plan is to not include trolley buses in the initial release. However, it’s still possible that they find the way into the release or into a DLC.”