For my area alot of people have had to sell their Prius car's because of slowness. The main interstate is you have to floor it or you will never get on. I have had almost 8 crashes because I am sitting and waiting fro a clearing to merge and I am sitting going about 6 miles per hour and I have to floor it to go but the Prius is all electric and I had to wait another 2 secodns for the gas engine to crank up and I almost got hit buy a car and had to swerve over, the state trooper saw and had to "escourt me" on the interstate using lights and sirens. Some people have said wait for a long gap, well honey there is no gap unless you wait for over an hour. I car about MPG, but also for my life