They are using firms such as Uber Eats, Just Eat and Deliveroo to place orders as they crawl along gridlocked roads.
Delivery people find them from their car models and registrations.
Driver then tuck in at the wheel so they do no have to wait until they get home.
The so-called “jam sandwich” trade has been rumbled by Twitter users.
“We are in a very long traffic jam because of a crash and a Just Eat motorbike went down the hard shoulder”
Rick, from London, said: “Just seen a guy get a food takeaway delivered to his car in a jam. So jealous.”
Georgina said: “We are in a very long traffic jam because of a crash and a Just Eat motorbike went down the hard shoulder.”
Another motorist in London said: “I saw a bloke getting a Just Eat to his motor in traffic on the North Circular the other day. Genius.”
Global chain Burger King is looking into the idea of a gridlock delivery service via motorbike through a concept it calls the Traffic Jam Whopper.
It is trialling the idea in congested Mexico City before rolling it out in other traffic hot-spots across the world.