This project belongs to the field of transportation engineering. Walking and bicycling are fundamental modes of urban residents' travel and the main mode of green transportation. To fill the gap in the planning and design technology of walking and bicycle systems, the project has been jointly researched by industry, academia, and research institutions for 12 years, pioneering and systematically establishing a set of technologies for improving travel quality that includes 'basic theories of operation - spatial planning methods - spatial environment design - spatial quality assessment'. The innovations are as follows: 1) A theoretical model for high-density pedestrian flow and mixed non-motorized vehicle traffic was created, updating the classification standards for capacity and service level. The crowd movement model for pedestrians compensates for the lack of monitoring and modeling of high-density (≥1 person/m²) pedestrian flows internationally; it determines the capacity of passages and stairs (about 4200 people/m·h). And for the first time, reveal the mechanism of no difference. Based on the laws of pedestrian avoidance and overtaking interactions, revise the HCM walking facility service level classification standards. For non-motorized vehicle mixed traffic flows, for the first time, provide a dynamic conversion coefficient (0.66-1.13) for equivalent bicycles such as electric bicycles, unifying the non-motorized vehicle counting standards. Establish an identification method for 'trajectory extraction - interaction behavior - conflict indicators' of pedestrian-vehicle conflicts, a bicycle riding safety evaluation method considering overtaking behaviors, and provide service level grading standards for intersections and bicycle lanes. The above achievements establish theoretical foundations and core technical parameters for the planning and design of pedestrian-bicycle traffic. 2) Established three types of walking-bicycle activity space units: slow lanes, slow cores, and slow spokes, as well as a demand analysis method, to accurately identify areas with high intensity of walking-bicycle activities. Establish facility layout rules for quality assurance in key areas and baseline control in general areas. For the first time, comprehensive thresholds for pedestrian crossing distances and bicycle detour distances are provided for slow traffic planning control, determining the network density requirements for walking and bicycling facilities at 8-14 km/km2. A three-level bicycle network layout method that distinguishes from traditional motor vehicle road classification is established to meet diverse activity needs, with functional classification, network density, and facility conditions as control indicators included in national standards. 3) An innovative street full-element design system, design parameters, and design technology oriented towards travel quality are created, including 8 categories and 25 design indicators. In response to the difficult problem of rebuilding pedestrian and cycling rights-of-way, Proposed key parameter values for the width of motor vehicle lanes that are controllable in terms of safety risks at 2.85-3.25 meters and a curb radius turn of 5-10 meters, which can increase the pavement area available for slow traffic by 13%-33%. Improved the layout of pedestrian and cycling space at intersections with coordinated signal timing, optimized the spatial arrangement of transfer facilities at bus microhubs, reduced crossing times for pedestrians and non-motorized vehicles as well as transfer time by 10%-25%. Developed an integrated design method for sidewalk-building setback spaces and methods to enhance environmental quality, issuing the first domestic street design standard. 4) Created travel quality assessment, diagnosis, and improvement technologies that integrate facility conditions, slow traffic environment, and subjective user experiences. Formed a system of indicators for travel quality perceptions including four major elements: safety, comfort, convenience, and cleanliness, constructed a three-level bicycle travel quality index calculation model and grading standards for road sections, intersections, and paths. Research and development of a cycling path search model and query platform based on service quality, supporting the improvement of slow traffic system facilities and services. The project pioneered and established a high-quality pedestrian and bicycle traffic planning and design technology system, reaching an international advanced level: the results were included in 3 national standards, 5 industry standards and landmarks, authorized with 6 invention patents, and published 21 papers indexed by SCI and EI. The achievements supported Shanghai's 2035 slow traffic system planning, the construction of a 45km slow traffic channel along the Huangpu River, more than 200 transportation projects to fill gaps, as well as landmark projects such as the reconstruction of over 200km of roads in more than 30 streets including Shanghai's Zhoujiahui Road and Ningbo's Zhongshan Road, with economic benefits reaching 520 million yuan in dozens of cities.