Highland cities like Baguio face unique transportation challenges due to complex topography, hazard exposure, and increasing demand, yet there is limited empirical guidance on designing context-specific mass transit systems. This study aims to identify the most suitable corridor locations in Baguio City for implementing an effective urban transportation model. Using a mixed-methods approach, the research combines GIS-based terrain and hazard analyses, demand estimation, and passenger surveys to evaluate three key corridors—Marcos Highway, Naguilian Road, and Loakan Road—based on their topography, safety, demand, and operational viability. Indicators such as slope feasibility, stop catchment demand, and hazard avoidance were used to assess the suitability of each corridor for different modes of mass transit. The findings show that Naguilian Road accommodates the highest demand but has moderate hazard exposure, while Marcos Highway offers better safety and reliability with lower demand. Loakan Road, characterized by steep grades and hazard-prone terrain, presents significant challenges for fixed-guideway systems but remains critical for access to hillside communities. Based on these insights, a “BRT-lite plus feeder” network is proposed, emphasizing corridor-specific infrastructure improvements, hazard-informed station siting, and operational enhancements such as priority treatments and real-time dispatching. The recommended model aims to optimize demand, improve safety, and enhance service reliability within the city’s geographic constraints. This research contributes to urban mobility planning by demonstrating how tailored, data-driven corridor assessments can inform the development of practical, context-sensitive mass transit solutions for hazard-prone highland cities.