safest car for driving expressways

Hello,
I need some of your opinion. What sedans/wagons
are the safest to be in when driving on the
expressways?

Here in atlanta, the roads are pretty wild with
cars and many trucks weaving in and out, not to
mention following too closely.

I have a 01'Honda accord which was rear-ended
recently, and am looking into other cars that would
be safer in expressways (hopefully not too expensive,
ie. under $30K if it's reasonable)

Appreciate the inputs!!! Thanks