Winter cities face the dual pressures of climate change and population aging, urgently requiring a shift from a singular focus on winter protection toward a development model adaptable to both winter and summer conditions. This shift is essential to enhance social resilience and safeguard the health of all age groups. This case study investigates how the thermal environment of life-sustaining streets in winter cities correlates with older adults’ daily activities. Employing Spearman correlation analysis, a heat exposure–pedestrian flow coupling matrix, and a comprehensive risk diagnostic model, the research analyzes the spatiotemporal variation patterns and underlying drivers of the street thermal environment. The key findings are: (1) All 15 surveyed streets exhibited Wet Bulb Globe Temperatures (WBGT) exceeding 28 °C during peak activity hours, with afternoon values (17:00–19:00) up to 2.7 °C higher than morning values. (2) On East Chaoyang Road, despite building shade and a high Visible Green Index (39.68%), the WBGT ranked second highest. This condition is attributed to a critically low average wind speed of 0.69 m/s (significantly below the city’s summer average of 2.67 m/s) and the widespread use of low-albedo asphalt, which collectively trap heat and negate the benefits of shading. (3) Using a dual-dimensional diagnostic framework, four streets were identified as dual-pressure streets with their combination of high elderly pedestrian flow (exceeding 126 persons/h) and high thermal risk (WBGT > 29 °C), marking them as priority intervention units. Based on these findings, the study proposes categorized street retrofit strategies that synergistically integrate climate adaptation and aging-friendliness. This provides an actionable, evidence-based foundation for planning decisions to support the sustainable renewal of winter cities amid climate change and population aging.

The scope of this research is focused on the segment of Yitong River in the Nanguan District of Changchun City. Utilizing GIS technology, a thorough analysis of the transportation accessibility in Nanguan District is conducted. Additionally, a survey is distributed to residents to explore their needs. Through this approach, the study aims to analyze the optimization pathways for green commuting under the guidance of intelligent transportation. The research reveals significant traffic pressure in the surrounding area, particularly concentrated in regions close to the city center. Despite residents having some understanding of green commuting methods, there is a need to enhance the application of intelligent transportation technologies. This study provides targeted optimization pathways for the intelligent transportation system at the intersections of Changchun’s city center, Yitong River bridges in Nanguan District, and commercial areas. It also proposes promotion plans for the green commuting infrastructure around major commercial zones and Yitong River bridges in the Nanguan District. Connecting Intelligent Transportation Technology to Green Mobility Modes. In conclusion, it is recommended that future urban planning in Changchun should prioritize the transportation nodes in the Nanguan District, with a focus on the directional development of green commuting and transportation management methods.

The community life circle is the spatial unit that residents have the closest contact with in their daily lives, and the service level of commercial service facilities within it is directly related to the quality of daily life of community residents. Based on multi-source data and using geographic information spatial analysis methods and statistical tools, this study measures the accessibility of various types of commercial service facilities at the neighborhood scale, using the Guilin Road Business District in Changchun's Chaoyang District as an example. This not only optimizes the allocation of commercial service facilities but also provides a reference for the study of other public service facilities. The results show that: (1) The accessibility of commercial service facilities shows significant regional differences. (2) There is an imbalance in the functional distribution of commercial service facilities, accompanied by the “island effect”. The study suggests enhancing the connectivity between the core and peripheral areas of commercial districts, optimizing the road network structure in the region, improving the accessibility of facilities in time and space, and exploring the promotion of the “shared commercial space” model.