As electronics become more interwoven into the urban fabric, new opportunities for safety and social sustainability arise. The MIT Mobile Experience Laboratory, in partnership with the Provincia di Brescia - Italy - is developing a ride-sharing system for youth that utilizes wearable media and promotes social sustainability. The system uses social networking, reputation management, referrals and geopositioning to match drivers and passengers according to preferences entered online in user profiles.

At the end of a night out partying and drinking with friends a Ridelink user can breathe into their breathalyzer bracelet to find out if it is unsafe for them to drive. Using a link to their mobile phone, the system can then help the user find a ride with a driver they trust. The system tracks successful ride shares and provides incentives to participants accordingly. Ridelink not only promotes responsible alcohol consumption, it encourages social sustainability by allowing users to self-organize into their own ride-share pools. It also shows how institutions can foster horizontal self-organization among groups to promote both safety and communal trust.

After internal testing in September of 2008, the system has been deployed in Bresica, Italy for testing in the field.