###### Abstract  
VANETs (Vehicular Ad hoc Networks) operating in conjunction with road-side infrastructure connecting road-side infrastructure are an emerging field of wireless communication technology in the vehicular communication's domain. For VANETs, the IEEE 802.11p-based ITS-G5 is one of the key standards for communication globally. This research work integrates the ITS-G5 with a cellular-based 5G Test Network (5 GTN). The resulting advanced heterogeneous Vehicular Network (VN) test-bed works as an effective platform for traffic safety between vehicles and road-side-infrastructure. This test-bed network provides a flexible framework to exploit vehicle-based weather data and road observation information, creating a service architecture for VANETs that supports real-time intelligent traffic services. The network studied in this paper aims to deliver improved road safety by providing real-time weather forecast, road friction information and road traffic related services. This article presents the implementation of a realistic test-bed in Northern Finland and the field measurement results of the heterogeneous VANETs considering the speed of vehicle, latency, good-put time and throughput. The field measurement results have been obtained in a state-of-the-art hybrid VANET system supporting special road weather services. Based on field measurement results, we suggest an efficient solution for a comprehensive hybrid vehicular networking infrastructure exploiting road weather information.  
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advanced, intelligent network containing heterogeneous networking capabilities for road traffic safety between vehicles and RSUs/RWSs. We used the sensor data of vehicles as well as the weather observation information from RWSs to develop a service architecture with the availability of real-time service capabilities. Mainly, we used commercial equipment, e.g., Sunnit briefcase and Cohda MK5 radio transceivers (Cohda Wireless, Wayville, Australia) to test the pilot system and to conduct field measurements in vehicular networking. The basic idea is to develop a state-of-the-art road traffic safety service architecture with accurate services such as location-based road weather data, forecast and accident alerts. This article also provides a platform for a real-time two-way communication with tailored pilot scenarios for vehicular networking. We conducted these pilot measurements using the Sod5G test-track in Sodankyla, Finland, as illustrated in Figure 1. The Sod5G test-track is majorly funded by the European Regional Development Fund (ERDF). The test-track has a length of 1.7 km and it is equipped with two road weather stations supporting an ITS-G5 protocol and a 5G test network base station together with different IoT sensors. This test-track offers the opportunity to design, develop, and test road weather services even in severe weather situations. In this article, we discuss the pilot measurements using ITS-G5 and 5 GTN operability. The pilot scenarios and field measurements provide the base to plan, design, and develop the real-time intelligent road traffic system with a set of example services working in the heterogeneous ITS-G5 and 5 GTN wireless technologies. The pilot system architecture and field measurement results are evaluated and compared with their expected results and requirements [4].  
This paper is organized as follows. In Section 2, key properties of ITS-G5 and 5G standards are discussed, followed by Section 3, overviewing the ITS enabled services for VNs and the pilot system. In Section 4, the pilot system deployment and field measurement setup are considered, followed by Section 5, where pilot and field measurements are presented. Section 6 presents the results and analysis, followed by Section 7, where conclusions are drawn.