M6 jct 11

[fourstardan]

This is a question for the dull mens club but I was on the M6 yesterday in flowing traffic (for once) and the M6 does a weird single lane split at Junction 11, I thought I was diverting off so went left on the chevrons.

Does anyone know why this is?

[fourstardan]

Ah so you can get to North/North East of Brum via the Toll Road.

I've always associated Toll with North/South travelling usage.