Multitrack maze type 1

Multitrack maze type 1 (pair connections) contains N (typically three) pairs of stations inside the maze. Each pair of stations is graphically distinguished by a specific token such as a star, triangle, circle, etc. The solution consists of drawing N completely separate tracks via the valid paths of the maze, so that each track connects one of the N pairs of stations.

Here is an example of a Type 1 multitrack maze:

Click to enlarge

Please comment. Your opinion and suggestions for improvement will be appreciated!