PURPOSES : This paper presents a description of the current issues facing road managers regarding the surface-type conversion of lowvolume roads for cost savings.
METHODS: The paper reviews previous works conducted toward this end, acknowledges gaps in the current research, and lays out what information is needed for further studies.
RESULTS : If the cost to maintain an unsurfaced road is less than the cost of maintaining a surfaced road, then there is potential for cost savings for the management agency. However, the problem is bigger than simply maintaining the roads that already exist. If unsurfaced roads prove to be more economical than surfaced roads, then the cost to convert from a surfaced to an unsurfaced roadway, and vice versa, when necessary, must also be examined.
CONCLUSIONS : No other studies have addressed the un-surfacing of a road for cost savings, and it is therefore unknown whether substantial savings can be realistically obtained by converting from a surfaced to an unsurfaced road. To determine whether a conversion policy would be a viable option, additional data and research are needed.

• Kim, Hyun Hwan(Texas State University·Graduate Research Assistant) | 김현환
• Evan Humphries(Texas State University·Research Associate)
• Jiong Hu(Texas State University·Associate Professor)
• Lee, Soon Jae(Texas State University·Associate Professor) | 이순제
• Lee, Moon Sup(Korea Institute of Civil Engineering and Building Technology·Senior Researcher) | 이문섭 Corresponding Author