Loud City Labs，骑行研究

is a data scientist, inventor, and founder of Loud Bicycle, where he has spent more than a decade developing car-horn-loud safety horns for bikes. His career connects road and traffic safety, human perception, and machine learning. Jonathan currently works at Cambridge Mobile Telematics, applying data science to transportation safety. He writes about the intersection of cycling safety, infrastructure design, and human behavior.

is an urban data scientist specializing in transit operations and traffic enforcement. Currently at Hayden AI. He has extensive experience collaborating across research and practice, having worked with the Chicago Transit Authority, MIT Transit Lab, and New York’s MTA to improve service reliability through better operations management and real-time information systems.