Last month 24-year-old student and cyclist Min Joo Lee was killed while travelling past King's Cross station – a short walk from the Guardian offices.

As a cyclist (who recently moved from the quieter streets of Cardiff to the rather hair-raising streets of London) Lee's death had a chilling effect on on my regular cycle-to-work – and sparked an interesting discussion about the dangers around some of London's busy junctions.

Shortly after the incident at King's Cross, a white painted bike was placed at the site of the accident to commemorate the loss and remind passers-by of cyclists' rights to travel safely.

This wasn't the first ghost bike I've seen and the Guardian has long had an interest in the voluntary project – writing about how the campaign started and spread across the UK and beyond, the meanings behind rituals of remembrance, looking at their prominence on London streets (and photographing them), and exploring whether the bikes act as real reminders of the dangers for cyclists to motorists.

Images of the bikes are frequently posted on the picture sharing website Flickr – creating a moving visual documentation of tributes to cyclists worldwide. As a collection, the pictures of the white bikes viewed in succession are arresting.

We're hoping to create a map of images from across the world of ghost bikes that have been erected for a short period of time, or still exist – to help portray the global impact of the project.

To submit your photos please add them to the Ghost Bike Flickr group and add the tag 'gdnghostbike' to your image so it can appear in the map. There are also details of how to geotag your picture in the group. If you're not on Flickr, or you have trouble submitting an image, you can email me at hannah.waldram@guardian.co.uk.

It's also worth taking a look at some of the images in the NYC ghost bikes group from the NYC street memorial project - the people who run ghostbikes.org.

The ghostbike.org site has this map which details the cyclists the ghost bikes are commemorating – and is well worth exploring – but we'd like to create a document of the many moving images posted on Flickr.

Head over to the group pool to submit a picture or leave a comment below about this post and the project.