To ensure that your opponents do not make any money by means of road
 transportation, locate a particularly lucrative road route belonging
 to the computer, find a bit where the road goes straight, lay a bit
 of railway track over and bulldoze it down. Strangely, the computer
 doesn't rebuild it, even if it previously owned it.
 
 
 Hints:
 Build a tunnel from one end of the map to the other 
 and the tunnel will be so expensive that the price 
 will get a negative amount that will be added to 
 your account.
 
 To ruin a good road network for a competitor, simply  
 place a rail piece at right angles over a piece of 
 road, then use the bulldozer to destroy it. The 
 computer will not rebuild it!
 
 Fast population:
 When creating a city, put down a large city, start expanding 
 it, take out all the small houses, and keep expanding. When 
 it takes a lot of clicks before it increases population 
 (usually around 30,000), put a small city as close as 
 possible, even if it touches. Then, delete the small city 
 and the large city's population will stay the same even 
 though a portion of the city itself was erased. This may 
 be repeated until about 70,000, at which point it will 
 revert back to 0.
 
 Faster trains:
 If you have a long train that takes a long time at stops, make 
 sure you have a train orientation depot on your track. When 
 it stops at a station, let it unload/load at a station, then 
 press the button with a train on it. Then the train that is 
 at the stop. Press the button to turn it around if needed, 
 then finally press the button that takes the train to the 
 depot twice, It will leave the stop and go to the next one.
 
 Eliminate CPU buses:
 Build a snaking railroad line over the bus route. The train 
 will destroy the CPU buses, but will also eliminate your own 
 trucks and buses. 
 
 Eliminate CPU airplanes:
 Build a tree covered tall hill at the end of the CPU's runway. 
 
 Good Ratings Made Easy:
 When you rename a town rename it "Happy Town" it will give