I read a very interesting traffic field study made by AlQabas paper about the travel time for some popular road destinations in Kuwait, what they basically did is that they have measured the average travel (driving) time needed to reach a particular destination with and without congestion. They chose Shuwaikh as a reference point (because it’s the worst as long traffic jam is concerned), and they measured how long it takes a driver to reach Shuwaikh say when you are coming from Salmiya, Salwa, Bneid Gar…etc.
They found it takes around 11 minutes from Bneid Gar to Shuwaikh in case there’s no traffic congestion, but during rush hours it takes over 65 minutes to get to Shuwaikh! However, they did not consider whether someone is taking a shortcut to reach Shuwaikh. Nevertheless, I find such studies useful and can help greatly to develop solutions. Personally, I think the benefit of having traffic jams is that there will be less traffic accidents than if the road is free for crazy drivers to over speed and do insane maneuvers.