How can I build a brick-built monorail track?

Question

LEGO haven’t released a new monorail set since the 90s, and the track parts that were made are very expensive and hard to find.

I am interested in building a brick-built alternative. I am particularly inspired by the build shown here.

---

Criteria

Vehicle

• 6 to 8 studs wide
• running on rubber tyres
• motor-driven

Track Elements

• straight – unlike the original, a central rack is not necessary for level or smooth gradients.
• curved – can be fixed angle or flexible.
• incline – can be fixed angle or flexible.
• track supports
• track switcher (Optional)

Parts

• Cannot use existing monorail parts (including the #2681 and #2680 supports).
• Avoid rare, expensive parts, or parts out of production.

Answer 1

There's an article about this topic in the November 2018 issue of HispaBrick magazine.

In addition to a nice interview with the designer (Masao Hidaka), the article shows off some of the techniques used for building the rails:

Technically, the design matches most of your specifications.

It even includes a rather complex motorized switch:

Here's a complete layout:

I'd definitely encourage you to give the full article a look.

Answer 2

Have a look at this youtube channel: MasaoHidaka The Track is made up with standard bricks and he managed to create nice curves and even switches. The switches are quite part intensive though.