1. [1] Japanese Ministry of Land, Infrastructure, Transport and Tourism: Research Report on the Safe and Comfort Environment for People with Low Vision, 2013 (in Japanese).
2. [2] Matsuda, Y. and Nishide, K.: A study on the walking behavior of university students who are blind and have low vision - Case study on the university campuses -, Journal of Architecture and Planning (Transaction of AIJ), No.614, pp.105-112, 2007 (in Japanese).
3. [3] Takahara, M., Sueda, O., Fujisawa, S., Shiota, H., Mima, A., Minato, H., Mitani, S., Yoshida, T.: Utility of tactile walking surface indicators for visually impaired persons, Research Bulletin of Naruto University of Education, Vol.23, pp.167-172, 2008 (in Japanese).
4. [4] ISO 23599: Assistive products for blind and vision-impaired persons - Tactile walking surface indicators, 2012.
5. [5] Japan Institute of Country-ology and Engineering: Guidelines for Improving Road Universal Design, 2011 (in Japanese).