Abstract—Intelligent Transportation Systems (ITS) are being vigorously researched and developed. The advent of the 5th generation networks (so-called 5G) in the early 21st century led to the formation of a series of smart applications. Mobile Ad-Hoc Networks (MANETs) are one of the most common solutions for communication between smart traffic applications. With outstanding advantages in establishing flexible connection and communication, recent MANETs are applied in various fields serving humanity, such as healthcare, military, smart agriculture, and smart cities, and are expected to make important contributions to future Internet development. Due to the mobility of network nodes, performance is one of the main challenges of MANETs. Many routing protocols have been proposed for MANETs to solve this problem. In this paper, we propose an improved routing protocol from Dynamic Source Routing (DSR) for MANET-based smart traffic scenarios. The proposed protocol uses mobile agents to collect routing information. The simulation results demonstrate that the proposed protocol improves packet delivery ratio, delay time, and throughput compared to traditional routing protocols in low-speed ITS scenarios.