I found another 2 wagons..making a 14 wagon train..plus caboose. Just afte the train has passed, you can hear a derailment, but then the truck pops back onto the rals and all is fine. Must get some more metal wheels!
The wagons are Aristocraft..the grade crossing is Life Like, and uses LGB track trip and switch motor components to automate the lights and sound. The barriers work by the weight of the train.