What is the correct aspects for a 3H/3T signal?

[MadMike1024]

An example: Track diverges in a 3 way wye. The center track is the through main, left branch is for the yard outfill, and the right track goes to a branch line.

If you use a 2H 3T signal, the main is the upper head, the others are shown by the lower head, e.g. either of the others selected is green on the lower head. Sort of makes sense...

However, shouldn't a 3H 3T signal display top green for through, center green for right, and bottom green for left (or vice versa as set up)? It doesn't, it acts as though it was a 2H 3T as above.

In a few places on one route, I've used a 2H 2T 1E for the yard and main, and added a third Head 1T 1T for the branch on the mast.

Am I wrong in how they should work? Help?

[harryadkins]

Here are some websites that explain modern signal practices on US railroads. I hope they help you.

http://www.vnerr.com/training/NORAC_Signal_Rules.htm

http://raildata.railfan.net/java/DivRte/NORAC.htm

http://modernrailroading.com/DigitalLib ... ations.htm

[Trainguy76]

For a wye you use a 3h/2T signal or a 2h/2T signal. Your zero link goes before the switch, by the signal, and the second and third are left/right.

[MadMike1024]

For a wye you use a 3h/2T signal or a 2h/2T signal. Your zero link goes before the switch, by the signal, and the second and third are left/right.

My situation is a 3 way wye... a straight track with two diverging branches. It's an odd animal, and a space save in a tight area. Lay the straight track first, then add the right branch. Once it is complete, look for the little line diamond, place the center of the square part of the track laying arrow on the diamond, then click and lay your left branch. It only uses one switch machine, which has three positions. Nice in a yard, or mine loading area.

[Trainguy76]

Try a 3H/3T signal where link 1 is strait, link 2/3 are left/right I guess.

[sleepyto]

Use a 3H3T signal and set the speed of the 2nd and 3rd links to different speeds. Say 15 for the yard link 25 or so for the spur link. That way the top would be Main track at highest speed, link 2 would be middle at mid speed
and the lower one Link3 would be for the yard. 3H signals act on speed of link not left or right.
Hope it works. Lots of Luck

[MadMike1024]

Use a 3H3T signal and set the speed of the 2nd and 3rd links to different speeds. Say 15 for the yard link 25 or so for the spur link. That way the top would be Main track at highest speed, link 2 would be middle at mid speed
and the lower one Link3 would be for the yard. 3H signals act on speed of link not left or right.
Hope it works. Lots of Luck

Did That and got an interesting result:

Main Line @75 MPH was Link 1 - top green, center red, bottom red.
Branch line @ 35 MPH was Link 2 - top red, center green, bottom red.
Yard header @ 15 MPH was Link 3 - top red, center flashing red, bottom red.

The flashing red is exit at reduced speed, so that's right. The bottom signal doesn't do anything. If you reverse the 2 and 3 links, the center signal is inactive, and the bottom signal displays as above.

MM

[sleepyto]

HI Mike:

I just tried the default tall 3H3T signal and got similar results.
Then I tried PikeHkr's CSX 3H3T signal and it worked perfectly. You might give those a try.
Also you might give SMM digital's griswold and Safetran signals a try.
Do not use anything that has USdef in the description as these do not operate the way you want.
Good Luck