Serial wireless IP networks for DOT applications

This work presents the use of commercial off-the-shelf (COTS) wireless Internet technology to meet needs of departments of transportation (DOTs). COTS wireless is an economical, scalable alternative to traditional fiber optics and telephony communications solutions. A virtual Ethernet network is created along a highway right-of-way (ROW) by installing wireless point-to-point links in a serial fashion that can extend upwards of 30 miles per section from a base node. This local area network (LAN) becomes a seamless extension of the DOT's communications for field devices such as cameras, RWIS, traffic sensors, and field personnel. This paper discusses the design and architecture issues of serial wireless LANs used in a transportation setting based on real world deployments and outdoor testing on Virginia's Smart Road Transportation test bed. Digital video applications along wireless networks are specifically addressed.