Using the On30 Switch Ties which are .110 inch thick that means they match pretty well with the code 100 Peco On30 track. I went ahead an used a file card and X-Acto blade to rough up the ties. They are three inches long (12 ft) and my road is 4 inches wide (16 ft) so I am adding the needed approx 4 feet as needed, staggering the joints so they center on the track ties. I’m using a thick body super glue – Aleens=’s Jewelry & Metal Glue to fix the wooden crossing timbers to the Peco plastic ties.
Since the crossing is just shy of a switch I am crossing two tracks with the center at an angle. No problem.
You may consider the timbers too light .. that is really a matter of how long they have been out in the weather. I figure I can always darken them some more but it is harder to lighten them if I get it too dark.