Hi all,  I am working on a new layout and I want to have the tracks run over top of each other in certain areas but am unable to find any type of piers which allow a train to travel on top as well as thru the bottom/center, sort of like how the cities have trains running over top of streets.  If this is something I have to make instead of buying, can anyone point me in the right direction.
Thank's in advance for any help.   

Hi all and Happy New Year.
I just purchased the overland set and I'm having some problems as follows;
a.  the train doesn't move until the controller is turned up to aprox. 30-40, with or without the cars attached.
b.  I tried to install a bridge set up but the train wouldn't make it up the hill.  I didn't even use the highest piers onlt the first 3 pieces for the rise and low sides.
c.  I added some of Bachmann smoke fluid but no smoke comes out.  I did see some of the fluid leak onto the track when parked.  Not sure if I overfilled it or it has a leak as there is no smoke.

One note here, I have another HO engine that I used and it had no problem going up and over the bridge.
I would greatly appreciate any help with these problems.  I like the set and want to build a large layout using itas long as I can get it to work properly.
Thanks.