Here is one for the "How to do" books!  A highway that can go uphill!
It is really a very simple thing that I stumbled upon in one of my
experimental ventures. 

1st:  Build a mountain with a flat and slanted face covered with 
waterfalls.  At the base of this face, make a pool of water that is 
large and wide.

2nd:  Go to the opposite shore of the pool and drag a highway toward 
the waterfall face of the mountain.

3rd:  The game will ask you if you want to build a highway bridge, it 
should be rather costly.  Say yes, and the bridge will continue up the 
waterfall to the top of the hill.  Thus, you have an uphill (or 
downhill if it matters) highway.

Many SimCity 2000 fans with steep mountains 
in their cities could benefit from this trick.

ADAM POTRATZ
Potratz5@ix.netcom.com