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2. A field operational test of roundabout in Iida City;Nakamura;Road,2011
3. Field operational test of modern roundabout in japan by collaboration with the local community;Nakamura,2011
4. Implementation of a roundabout initiative in Iida City;Matsuda;IATSS Rev.,2014
5. Safe and ecological roundabouts for reconstruction of a disaster-stricken area;Nakamura;IATSS Rev.,2011