Washington DC to Buffalo

I know there is mapquest, but i ve used several different directions and gotten 3 different routes that they say is the fastest. I have also gotten estimates ranging from 6.5 to 9 hours for the drive. Can somebody that has driven these roads tell me what route is the fastest and how long the drive is? The three routes from Baltimore/Washington to Buffalo/Niagara Falls are:

1) I-70 to I-76 to I-79 north to Erie to I-90 East to Buffalo, then I-190 north to Niagara Falls. This would of course the all-interstate option, but is much more distance than the other routes.

2) I-70 to I-99 north to US 322 to I-80 west to US 219 north to Buffalo to I-190 north to Niagara Falls. This is the shortest distance route,but is much more rural.

3) I-695 to I-83 north to Harrisburg,PA to US 22/US322 north to US 15 north through Williamsburg, PA to Corning, PA to I-86 west to I-390 north to I-90 west to Buffalo to I-290 north to I-190 north to Niagara Falls.

Which of these routes is the fastest and how long is the drive?

Thanks-

Washington DC to Buffalo

We just returned from your area by way of Annapolis MD. We use your route #3 and expect about a 9 hour trip.

Washington DC to Buffalo

I usually come up from the DC area so i skip the I-83 portion but come up Rt.15 North through Harrisburg and continue on option #3. Don%26#39;t bother with options #1 or #2. #3 is the quickest in real life and it%26#39;s also the most scenic and interesting. With minimal stops it usually takes me about 7.5-8 hours to Amherst, NY. Niagara Falls might be another 30 mins tops.