The agency is to handle TfL’s comms to promote two initiatives, The Santander Cycles Roadshow and The Mayor’s Vision Cycling Roadshow, aimed at inspiring Londoners to cycle.
Grayling won the brief following a competitive pitch.
It will be the second year running that the agency has worked with TfL to promote cycling in London. Grayling said last year it engaged more than 10,000 Londoners in the programme.
The two programmes this year will involve more than 50 events across London.
Grayling’s brief is to organise, promote and manage events for both roadshows, which will visit high-profile central London locations, major cycling events and local community events and festivals.
Rikki Butler, TfL account lead at Grayling, said: "This year we have come back with fresh and innovative ideas that we strongly believe will again capture the imagination of Londoners – both those who already cycle and those who have never cycled before – as part of a greatly expanded roadshow programme."