The document provides an overview of technological improvements in bus rapid transit (BRT) and bus with high level of service (BHLS) systems. It discusses the key components of BRT and BHLS including segregated busways, stations, vehicles, and intelligent transportation systems. Case studies are presented on early BRT systems in Curitiba, Paris, and Bogota that demonstrated innovations like busways, prepayment at stations, and centralized control. More recent examples from Istanbul, Guangzhou, and Sao Paulo showcase advances like express bus services, reducing transfers, and high commercial speeds. The document also reviews trends in areas like vehicle guidance, propulsion technologies, fare collection, and advanced operations planning with real-time