I've been skimming through the Bedford MPS and found an interesting section relating to the future of the Bedford Highway. It basically states the Bedford Highway should not be a high volume, high speed corridor but rather a high volume, low speed corridor. It suggests having a maximum travel width of 48 feet which would fit three lanes of traffic and that over time all sections of the Highway in the Bedford plan should be reduced to this width.
I think roundabouts fit this policy perfectly.
P.S. there is also another policy that says cycling shall be encouraged in Bedford.