Cabbies unite to share condolences:
Several taxi drivers took to social media to share their condolences for the male fatality, believed to be a London black cab driver.
Many of those who did tweet responding to the sad news were cab drivers themselves.
User @LDNCabbie said: "RIP thoughts are with the families involved," whilst @Robsblackcab wrote: "Terrible. Could have been any of us. My way home every day."
One tweet, from @AndyCabby10, said: "Shocking. So sad. Came home on that stretch of road a couple of hours earlier as, I'd imagine, many other Cabbies did....tragic."
"Dear God just seen the aftermath of horrific crash with London Taxi involved on the A13 eastbound just after Dagenham turn off. Feel sick pray all ok," said one witness.