In India, the escalating motorized transportation sector has led to a concerning rise in road traffic accidents and fatalities, imposing severe social and economic repercussions. Addressing this issue, we present a novel approach leveraging smartphone technology to develop a speed limit warning mobile application aimed at enhancing road safety. The application computes the real-time speed of vehicles and compares it with the government-posted speed limit, issuing warnings to drivers upon exceeding the limit. Field data collection of speed limits on major roads in Pune city was conducted. The application is written in Flutter and uses a location plugin for GPS functionality. The application is also integrated with Google Maps for navigation purposes. Audio and visual alerts promptly notify drivers of speed limit violations, supplemented by advance warnings. Our application offers a cost-effective and accessible solution to curb excessive speeding, contrasting with existing road safety systems in India. The proposed system serves as a crucial tool to bolster road safety efforts, ensuring the well-being of Indian road users. Its implementation demonstrates a direct and positive impact on community road safety, underscoring its significance in mitigating the adverse effects of road traffic accidents. Through this paper, we contribute to advancing road safety initiatives in India and beyond, fostering safer transportation environments for all.