Limit train noise in a home that borders a caltrain line?

Just bought a nice home on caltrain line. Now we are freaking out about the sound -- outside and inside. Any suggestions on how to deal with the sound?

Answers:
Here in Texas when a major highway is constructed close to a housing complex, they construct large "reflecting" walls. These walls stand about 15-20 feet tall and are constructed of brick, concrete, or metal. The sound traveling from the highway hits these walls and bounces back keeping it away from the homes. Sure it doesn't stop all the noise, but it does suppress it some. The only question would be if you can obtain the permits to do such a thing where you live. I'm sure it might be a bit pricey also. Just an option to think about though. T.G.P.

Other answers:
What thickness are your windows? Most of sound travels through glass. Try to get at least dual-pane windows. They are even making triple-pane windows now that have great sound resistance. (Although, I don't know how they hold up to trains.)
What thickness are your windows? Most of sound travels through glass. Try to get at least dual-pane windows. They are even making triple-pane windows now that have great sound resistance. (Although, I don't know how they hold up to trains.)
There's all kinds of acoustic/soundproofing products that you can put on the walls and windows.

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