Nike 'chalkbot' by DeepLocal

The 'chalkbot' will be out in force during the cycle race, as people contribute messages of love and remembrance for victims and sufferers of cancer.

The chalkbot works by deciphering messages transmitted by two computers within its mechanism. People can text or email their messages to the machine to then have them translated in chalk.

The campaign has been created as part of Nike's involvement with cyclist Lance Armstrong's 'Livestrong' foundation, which works to help and support people affected by cancer.