Rush-hour lanes are widely used in The Netherlands. The extra lane on the hard-shoulder or on the left side of the runway is opened during a certain period of time, e.g. peak periods. The effects of rush-hour lanes are very positive. But still there a number of issues that need to be researched, such as safety issues during opening and closing the lane and the link between the design and the behaviour of the road users.
If this research question interests you and you want to start an official project, contact ITS Edulab.