4/5 road races usually are packed and hard to move up in. People just don't have the pack skills and end up boxing you in all the time. Last weekend I can't tell you the amount of times I should have been able to move up and was blocked at the last second because of a guy not holding his line. Trying to find the holes and gaps takes time, but it's the only way. I prefer to move up in the middle of the pack instead of the outside, unless I want to move up asap, just because the wind sucks on the outer sides. It's much nicer in the lower categories because it's a lot more fluid, and you can move up when you want as long as you make your own gaps.