The Blackwall Tunnel

Through me you go to the grief wracked city; Through me you go to everlasting pain; Through me you go a pass among lost souls... And I endure eternally. Surrender as you enter, every hope you have.
- Dante's Inferno, Canto III

Reader Ed and his family have been seduced to Brockley from Hackney and would like to know whether any Brockley residents regularly use the Blackwall Tunnel during rush hour and - if so - how long the journey usually takes and how often it goes wrong.

Any advice welcome.