This is just the nature of the inner city freeway beast. You're going to have curves.....the trick is to keep the curves loose enough to where traffic doesn't have to slow down TOO much. It's part that, and partly on the drivers themselves. If people just slow down a little further back before the curve instead of slowing down a lot at the last minute, congestion wouldn't be so bad. You know where the curve is and at what speed you should take it and those facts never change......so just start slowing down sooner. With less congestion you'll actually get to where you need to go quicker.