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The management of road networks requires accurate information on surface condition. Automated methods have been developed to collect road surface data, based on digital imaging systems with or without laser-profilers. While these represent state-of-the-art technology, the equipment is expensive and there are issues on accuracy and robustness. In a broad sense, the issues extend to whether user needs can be met with alternative, less-expensive technology, and whether this can be accomplished with modifications and (or) integrating a new technology with the existing equipment. This paper addresses the foregoing issues as a fundamental research and development question. It suggests that photogrammetric techniques have the potential to provide a unique and practical answer to the question. An overview and detailed formulation of the photogrammetric technology is described, with examples from …