I use azatrax sensors. They aren't cheap if you need several of them, but I tried z-stuff sensors and when I added snow to my layout last Christmas they lost their mind. Z-stuff products are good, but I had a whole bunch of snow material everywhere and with all the reflective surface there was too much light scatter. The azatrax stuff is bullet proof.
Azatrax also has crossing gates and signals, but I don't use them. I use MTH or the lionel scale size banjo signal and it fits well with On30. The Lionel is discontinued but I have found them on Ebay. Here is one right now, but be sure you look for model #6-14149 because that is the scale model.
https://www.ebay.com/itm/Lionel-Scale-Sized-Banjo-Signal-6-14149-NOS-46-170-/253335064278?&_trksid=p2056016.l4276Here is the MTH that is currently available,
https://mthtrains.com/30-11006but I like the discontinued model that is black and you can also find them from time to time on ebay and they fit into the holiday display better than the newer silver models. There are none right now, but here are some completed auctions for the 30-11010 model:
https://www.ebay.com/sch/i.html?_from=R40&_nkw=mth+30-11010&_in_kw=1&_ex_kw=&_sacat=0&LH_Complete=1&_udlo=&_udhi=&_samilow=&_samihi=&_sadis=15&_stpos=20110&_sargn=-1%26saslc%3D1&_salic=1&_sop=12&_dmd=1&_ipg=50I was looking at the Zstuff components, both for the Crossing Gate System and for a system to stop trains at various points along their route like at train stations. My problem is I am not very “electrical” savvy so need to go with the simplest system possible.
Anyone have a preference?
For automated control I use the Tamvalley train shuttle. I use it for a bachmann railbus that acts like a trolley and have it set to stop at the station on either end and at various mid points to pick up passengers. I even added track switches this year (turnouts) that splits off the track at 2 points and the train shuttle controls it all automatically. Very handy device, but it takes a bit of work to wire it all up because it uses rail gaps to detect train location.
http://www.tamvalleydepot.com/products/trainshuttle.html