Urban intersections in Hyderabad face severe traffic delays, adversely affecting economic viability, fuel consumption, and urban mobility. This study focuses on mode-wise delay estimation for various vehicle types, analyzing the impact of different signal timings and assessing the potential benefits of grade-separated intersections like underpasses. Using the PTV Vissim simulation tool, vehicle delays are quantified under heterogeneous traffic conditions, and the effectiveness of various traffic management strategies is evaluated. The methodology includes detailed data collection through videographic surveys, calibration of the simulation model with field data, optimization of signal timings, and comparative analysis of cycle durations and intersection configurations. Key findings reveal that a 240 s signal cycle reduces average delays by 57.21% and improves average speeds significantly compared to 180 and 120 s cycles. Annually, approximately ₹4.54 million is wasted due to idling fuel consumption for Leg 1, underscoring the critical need for implementing measures to optimize fuel efficiency and reduce operational waste. Additionally, grade-separated intersections achieve the least delays and highest average speeds, underscoring their efficacy as long-term solutions for mitigating congestion. This research provides actionable recommendations for traffic management strategies to enhance intersection performance and urban mobility in Hyderabad.