What design elements or features would make a bike lane truly safe and free of obstacles during peak hours, and are there any existing examples of cities or countries that have successfully implemented such designs? Would features like protected bike lanes, smart traffic signals, or advanced cyclist detection systems be enough to minimize the risk of accidents, or is there a need for more innovative solutions? How can urban planners and policymakers balance the needs of cyclists with those of motorists and pedestrians to create a harmonious and safe transportation ecosystem? Are there any emerging technologies or trends that could play a crucial role in enhancing bike lane safety, such as AI-powered traffic monitoring or bike-to-infrastructure communication systems?