Referenced here as a kind of book mark:

http://web.archive.org/web/20080705054916/http://www.ngltc.org/train_depot/inclines.htm

Rules listed there:

  • Rule 1: The steepest slope should change the height by no more that 2 plates per piece of track.
  • Rule 2: The angle of the incline should change by no more that 1 plate per piece of track.
  • Rule 3: Don’t have points at an inclined angle, they need to be flat.
  • Rule 4: There should be at least one length of level straight track between any point and any inclined piece of track.

The exact brick count is as follows, where x.y means x bricks and y plates.

Column Height Plate Height
1 0.1 1
2 1.0 3
3 1.2 5
4 2.1 7
5 3.0 9
6 3.2 11
7 4.1 13
8 5.0 15
9 5.2 17
10 6.1 19
11 7.0 21
12 7.2 23
13 8.1 25
14 9.0 27
15 9.2 29
16 10.1 31
17 11.0 33
18 11.2 35
19 12.0 37