About 800 people gathered in Madison on Sunday to honor Sasha Rosen, the 17-year-old killed while crossing South Park Street on his way to school in February, and call for action on traffic safety. The second annual Ride and Walk for Your Life brought participants from Brittingham Park to the state Capitol, with some biking six miles and others walking one mile. The gathering combined a memorial for Rosen with a push for legislation targeting drivers convicted of repeated reckless driving or extreme speeding. Rosen’s mother, Nadya Rosen, described her son as funny, caring and generous, and said the loss had been devastating. Friends and former co-workers from Camp Shalom remembered him as an easygoing presence who brought joy to those around him. The proposed measure, which supporters hope to revive as “Sasha’s Bill,” would require a GPS-based speed-limiting device in vehicles driven by people with at least two reckless-driving incidents. The proposal includes cases in which a driver is recorded going more than 20 mph over the speed limit, according to Rosen. Similar proposals — Senate Bill 659 and Assembly Bill 655 — were introduced last year but did not receive a floor vote. Rosen said she supports the measure, arguing it would focus on highly reckless driving rather than minor speeding. She also urged drivers to obey speed limits, yield to pedestrians and cyclists, and stay out of bus and bike lanes. The driver charged in connection with Rosen’s death, Kathleen Borgwardt, faces a count of second-degree reckless homicide and has pleaded not guilty. A status conference in Dane County court is scheduled for next month. For Rosen’s family, Sunday’s turnout was both a tribute and a call for change. Her mother said she hopes the community will treat traffic laws as a shared responsibility, noting that decisions behind the wheel can put other people at risk.