• Aiswarya Raghu
• Basil George
• Harikrishnan Shibu
• Lakshmi
• Keerthy Sabu

Level of Service (LOS) is commonly applied as an indicator to assess the performance and operating quality of signalized intersections. Conventional LOS evaluation methods, such as those described in the Highway Capacity Manual (HCM) and the Indian Highway Capacity Manual (Indo-HCM 2017), mainly depend on operational parameters including control delay and saturation flow rate. In heterogeneous traffic environments typical of Indian cities, these operational indicators alone are insufficient to represent the actual experience and satisfaction of road users. Consequently, recent research has increasingly explored perception-based LOS approaches that consider the subjective responses of both motorists and pedestrians. This study reviews earlier work related to perceived LOS modelling, covering motorist-oriented models, pedestrian-focused assessments, and the use of intelligent classification techniques. Through this review, a significant research gap is identified: existing studies rarely address pedestrian–motorist interaction within a single integrated LOS framework at intersections. The study therefore highlights the need for a comprehensive perception-based LOS model that evaluates the combined experience of different road users under heterogeneous traffic conditions.

Level of Service (LOS), Perceived Level of Service, Signalized Intersections, Heterogeneous Traffic, Pedestrian–Motorist Interaction, User Perception, Traffic Operations, Intelligent Classification Methods.

"Assessment of User-Perceived Level of Service at Signalized Intersections: A Review ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.13, Issue 3, page no.c254-c259, March-2026, Available :http://www.jetir.org/papers/JETIR2603232.pdf

"Assessment of User-Perceived Level of Service at Signalized Intersections: A Review ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.13, Issue 3, page no. ppc254-c259, March-2026, Available at : http://www.jetir.org/papers/JETIR2603232.pdf