Contrail is a bicycle advocacy tool.

Help us give Contrail to non-profits to build stronger bicycling communities. Non-profits can use Contrail to guide group bicycle rides, increase road safety, and make bicycling more fun. To help, pledge on our kickstarter page.

To learn more about the Contrail device and its other applications click here.



We’re working on our final production prototype tonight. Pictures in a week.


The Contrail path at Opportunity Green.


Contrail at Opportunity Green


Contrai is made by ULICU, LLC

All materials [c]2010 ULICU, LLC. The Contrail devices is Pat. Pending.