I have been trying to lay a 6 mile stretch of track but for some reason when I install a section of rail, I should get a yellow indicator when the rail is perfectly straight but instead the section blinks out when it is straight rather than show the yellow indicator so I end up with a serpentine appearance instead of a long straight line.
In my experience, this happens when snap to track is enabled. It can be disabled by unchecking it in the fly out menu on the bottom left of your screen.
Thank you buynot. I have it now. I just layed a single straight track and slid it over the overly, squared it up on both ends and then layed about 4 miles right on target.
<pedant>The yellow indicator can appear when Snap To Track is enabled, but only on very short sections of tracks.</pedant>