Something needs to be done.It is not as if traffic congestion around Birmingham/Midlands is anything new - they were planning a relief road from around 1980.
Is it fit for purpose as it stands? it was originally planned as a relief road after all, to lower congestion on the M6 and I do not think it has achieved that goal at all. The reason why has to be the toll fees. Dartford Crossing works because there really is not practicable alternative, so everyone pays up with varying degrees of enthusiasm. But the M6 toll road has never attracted the level of traffic it was designed for, especially trucks from the road haulage firms, because of the cost.
It has become, comparatively speaking,a ghost road, populated mostly by the unsuspecting and those who can afford it.
If it is ever to achieve its purpose, the toll fees need to be reduced. And it is not as if the need for a relief road has gone away.