YOSHIDA Nagahiro

写真a

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Title

Associate Professor

Laboratory location

Sugimoto Campus

Degree 【 display / non-display

  •  -  Doctor of Engineering

Research Areas 【 display / non-display

Infrastructure Planning / Transportation Engineering

Research subject summary 【 display / non-display

  • Infrastructure planning and transportation engineering regarding social issues such as safety, environment, and health that would be improved in the near future. Especially, traffic safety issues for vulnerable road users as well as bicycle transport policy in Asian countries.

Research Interests 【 display / non-display

Pedestrian Safety, Bicycle transport policy, Road Safety

Research Career 【 display / non-display

  • transport policy, Infrastructure design, and management for bicycle

    (Collaboration in Japan) Project Year :

    2006.04
    -
    Today

    Keyword in research subject:  Traffic engineering

  • traffic safety for surface transport

    (Individual) Project Year :

    1995.04
    -
    Today

    Keyword in research subject:  traffic engineering

  • road-related thermal environment for pedestrians

    (Individual) Project Year :

    1998.04
    -
    2013.04

    Keyword in research subject:  Pedestrian, thermal environment

  • User evaluation of public transportation system

    (Collaboration in Organization) Project Year :

    2001.04
    -
    2017.04

    Keyword in research subject:  public transportation system, Intelligent transportation systems

Education summary 【 display / non-display

  • Planning theory and engineering approach for urban public space for not only system but also users using mathematical or statistical methods.

Association Memberships 【 display / non-display

  • Japan Society of Civil Engineers

  • International Association of Traffic and Safety Sciences

  • Japan Society of Traffic Engineers

  • Traffic Science Society

  • The City Planning Institute of Japan

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Committee Memberships 【 display / non-display

  • 2019.06
    -
    Today

    The City Planning Institute of Japan   Committee on planning and coordination in Kansai Branch

  • 2019.04
    -
    Today

    International Association of Traffic and Safety Sciences   Strategic meeting for 50th aniv.

  • 2019.04
    -
    Today

    International Association of Traffic and Safety Sciences   IATSS forum steering committee

  • 2019.04
    -
    Today

    International Association of Traffic and Safety Sciences   committee on planning and coordination

  • 2018.06
    -
    Today

    Japan Society of Traffic Engineers  

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Awards & Honors 【 display / non-display

  • Best Paper & Presentation Award in Young Researcher's Forum

    2018.08   11th Annual Conference of Asian Transportation Research Society

Current Career 【 display / non-display

  • Osaka City University   Graduate School of Engineering   Urban Engineering Course   Associate Professor  

Career 【 display / non-display

  • 2013.04
    -
    Today

    Osaka City University  

  • 2015.11
    -
    2017.03

    Osaka City   City Planning Bureau   Researcher for Measures on City Planning

  • 2007.01
    -
    2007.09

    Academic Affiliate, University College London  

  • 2003.04
    -
    2013.03

    Osaka City University  

  • 2000.04
    -
    2003.04

    Osaka City University  

Graduate School 【 display / non-display

  • 1997.04
    -
    2000.03

    Osaka City University  Graduate School, Division of Engineering  Civil Engineering 

  • 1995.04
    -
    1997.03

    Osaka City University  Graduate School, Division of Engineering  Civil Engineering 

Graduating School 【 display / non-display

  • 1991.04
    -
    1995.03

    Osaka City University   Faculty of Engineering   Civil Engneering

 

Published Papers 【 display / non-display

  • CASE STUDY ON THE DAILY USE OF TWO-RIDER BICYCLES FOR PERSONS WITH REDUCED MOBILITY BY WELFARE SERVICE PROVIDERS

    KONISHI Takuya, YOSHIDA Nagahiro

    Japan Society of Civil Engineers, Journal of Japan Society of Civil Engineers, Ser. D3 (Infrastructure Planning and Management)  75 ( 5 ) I_1197 - I_1203 2019.12  [Refereed]

     View Summary

    It is demanded to realize the society anyone can travel freely, and the two-rider bicycle might be a potential, practical means of transportation for persons with reduced mobility (PRM). The purpose of this study is to understand the latent opportunities for use of two-rider bicycles by PRM and welfare service providers from the questionnaire and hearing survey, and to understand the influences of the daily use of two-rider bicycles by welfare service providers from the fact-finding case survey. The results confirmed that there were latent opportunities and some influences by PRM and welfare service providers, it might lead to promotion of using two-rider bicycle for PRM and welfare service providers.

    DOI CiNii

  • Empirical analysis of hazard perception and driving behaviors among high school and college students on motorcycles in Phnom Penh, Cambodia

    Nagahiro YOSHIDA, and  Toshiki KOYANAGI

    International Association of Traffic Safety and Sciences/IATSS RESEARCH  42 ( 4 ) 171 - 179 2018.12  [Refereed]

    DOI

  • Latent Opportunities for the Use of Two-Rider Bicycles and Associated Challenges by Welfare Service Providers

    Japan Society of Traffic Engineers/Proceedings of Annual Conference on Traffic Engineering  38   731 - 735 2018.08  [Refereed]

    CiNii

  • An Analysis of Driving Behaviors among High School and College Students on Motorcycles in Phnom Penh, Cambodia

    Japan Society of Traffic Engineers/Proceedings of Annual Conference on Traffic Engineering  37   701 - 704 2017.08  [Refereed]

    CiNii

  • Link-based Accident Risk Analysis Using Near Miss Incidents in Trunk Roads

    Japan Society of Traffic Engineers/Proceedings of Annual Conference on Traffic Engineering  36   229 - 232 2016.08  [Refereed]

    CiNii

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Books etc 【 display / non-display

Review Papers (Misc) 【 display / non-display

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Conference Activities & Talks 【 display / non-display

  • Vital Reactions as a Measure of Stress Levels in Bicycle Riders According to Task Complexity

    Katsumasa TATSUNO, and Nagahiro YOSHIDA

    The 8th International Cycling Safety Conference  2019.11 

     View Summary

    There are various types of bicycle infrastructure, including separated and shared paths on sidewalks and roadways alongside other transportation modes. Although each type of bicycle path requires different skills and confidence from cyclists, interactions between user response and path conditions have not been captured well.
    Previous studies have shown that safety, stress, and comfort levels of cyclists affect route choice behaviours. In terms of stress response, researchers have developed evaluations of road conditions by measuring vital reactions using heart rate interval (RRI), Galvanic skin response (GSR), Electroencephalography (EEG), and Electromyography (EMG). While riding a bicycle in various conditions affects user response through vital reactions, few studies have considered the comprehensive relationship between stress response and the task intensity, as cycling requires physical activity under complex task conditions.
    Therefore, in order to obtain some basic insights on vital reactions associated with road conditions during bicycle use, an experimental observation of vital reactions using RRI, EMG, and GSR in two different designated courses that required different riding tasks considering individual riding experience was conducted. Subjects were five students with different frequencies of bicycle usage on a daily basis.
    Results indicated that vital reactions while riding on the paths requiring multitasking, such as movement among other bicycle users and tilting the vehicle during curved driving, showed an increase on all indices compared to the reactions under single-task conditions. In addition, it was found that the vital reactions in daily users tended to be larger under any driving conditions compared to the reactions of occasional users.
    With respect to the next step, additional observations on different roads under heavy traffic conditions will be measured, followed by an analysis of the interrelationship between riding situations associated with traffic conditions and vital reactions.

  • Evaluation of Road Space Reallocation for Pedestrians and Cyclists Using the Level of Service Concept on Midosuji Street in Japan

    Haruka KAWACHI, Nagahiro YOSHIDA, and Atsushi TAKIZAWA

    The 20th International Walk21 Conference on Walking and Liveable Communities  2019.10 

  • Introducing Case Examples of Analyses of Actual Situation of Use of Two-Wheeled Vehicles by High School and University Students in Phnom Penh, Cambodia

    Nagahiro Yoshida  [Invited]

    Seminar & Workshop on Traffic Culture and Traffic Safety  2019.10 

  • Changes in Subjective and Objective Comfort for Pedestrians and Cyclists After Road-Space Reallocation : A Case Study of Midosuji, Osaka

    Haruka KAWACHI, Nagahiro YOSHIDA, Pola BERENT, and Taku FUJIYAMA

    The 13th International Conference of the Eastern Asia Society for Transportation Studies(EASTS)  2019.09 

  • Latent opportunities for two-rider bicycles and associated challenges based on assessments of its use by people with reduced mobility

    Nagahiro YOSHIDA

    VELO-CITY GLOBAL 2019  2019.06 

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Grant-in-Aid for Scientific Research 【 display / non-display

  • A study on safety evaluation of junction treatments considering bicycles running on the carriageway using driving and cycling simulator

    Project/Area Number : 25289166  Grant-in-Aid for Scientific Research(B) Partaker / Other

    Project Year :

    2013.04
    -
    2016.03
     

    Partaker : OKUSHIMA Masashi, KIN Toshiaki, MITANI Tetsuo, YOSHIDA Nagahiro, MATSUMOTO Shuuichi

     View Summary

    The aim of this study is to evaluate the safety of junction treatments considering bicycles running on the carriageway. Behavior of bicycles and vehicles at junctions were analyzed. A new type of driving simulator (DS) in which drivers and cyclists can move simultaneously in the virtual space was developed. By using this DS, experiments were carried out to evaluate the two types of junction treatments to avoid left-turn accidents, that is, separation of bicycle and vehicle and merging of vehicle into bicycle lane before the junction. According to the results of TTC (time to collision), crash incidence ratio and such safety indices, merging system is better than separation system. On the other hand, merging system is not so better from the viewpoint of the safety feeling of cyclists and drivers. It means the necessity of campaign and education to introduce the merging system as junction treatments considering bicycles.

  • Development of Compatibility Evaluation Systems for Diversifying Personal Mobilities and Road Management

    Project/Area Number : 24360203  Grant-in-Aid for Scientific Research(B) Partaker / Other

    Project Year :

    2012.04
    -
    2015.03
     

    Partaker : YAMANAKA Hideo, YOSIDA Nagahiro

     View Summary

    Recently in Japan, personal compact transports are remarkably diversifying by reason of social changes such as the needs for high mobility, aged society, and environmental problems. The characteristics are electrification and miniaturization. Then some transports are nearly same in size, performance, and form , though those legal positioning is different. So it is difficult to distinguish the similar modes. Firstly, this paper grasps the tendency of the diversification and traffic problems on road and depicts the points for the compatibility of the transports on the road. Secondly, applicability of three evaluation methods for the road space-BCC・Satisfaction Measurement・Stress Measurement-, is inproved. Finally, the traffic conscious gap between one and the other is found , and it is clear that the new communication tools (ring the bell, saying something, etc.) is necessary.

  • Study on informative signage and road markings consideringcharacteristics of bicycle users' eye fixation

    Project/Area Number : 22360209  Grant-in-Aid for Scientific Research(B) Partaker / Other

    Project Year :

    2010
    -
    2012
     

    Partaker : KIN Toshiaki, YOSHIDA Nagahiro, OKUSHIMA Masashi, SANADA Junko

     View Summary

    The aim of this study is development of method for improving the streets' informativitity of rules for bicycle users by using street design, signage, and road markings and so on, in order to achieve the promotion and safety of bicycles in urban areas. 1) The characteristics of exe fixation are analyzed, and road marking type have advantage for cyclists. 2) Interpretation of cyclists for different size of sign are analyzed, and as a result, necessity of quite large size marking is found. 3) "Repeat color markings system" is proposed and the effective size and intervals are analyzed by off-road experiment.

  • Development of Cycle Review System for Designing Bicycle Friendly Space

    Project/Area Number : 20360227  Grant-in-Aid for Scientific Research(B) Partaker / Other

    Project Year :

    2008
    -
    2010
     

    Partaker : YAMANAKA Hideo, OGAWA Keichi, YOSIDA Nagahiro

     View Summary

    The evaluation method for bicycle road space are needed in order to construct the appropriate bicycle road space. First, the evaluation method of level-of-service for the shared use sidewalks is developed. And then the evaluation method of bicycle lane using bicycle users' satisfaction is developed and the service level of bicycle lane is proposed. Second, the Bicycle Compatibility Checklist is developed and the precedent bicycle friendly space are evaluated using this Checklist. Finally the strategy for building bicycle road space is proposed.

  • A System for Visually Handicapped to Town Walk : Application development of mobile phone based system combined with RFID

    Project/Area Number : 18360247  Grant-in-Aid for Scientific Research(B) Partaker / Other

    Project Year :

    2006
    -
    2008
     

    Partaker : YOSHIDA Nagahiro

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Other educational activity and Special note 【 display / non-display

  • Contribution to FD activities

    (2013)

Educational activity record 【 display / non-display

  • Academic year : 2013

     View Details

    Number of instructed the graduation thesis
    3
    Number of graduation thesis reviews
    6
    Number of instructed the Master course
    3
    Number of instructed the Doctoral course
    0
    Number of master's thesis reviews (chief)
    2
    Number of master's thesis reviews (vice-chief)
    0
    Number of doctoral thesis reviews (chief)
    0
    Number of doctoral thesis reviews (vice-chief)
    1
 

Foreigner acceptance 【 display / non-display

  • Academic year : 2019

     View Details

    Number of International Students
    1

    China

  • Academic year : 2018

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    Number of International Students
    1

    China

  • Academic year : 2017

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    Number of foreigners accepted
    1

    United Kingdom

  • Academic year : 2015

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    Number of foreigners accepted
    1

    Netherlands

Other international activities 【 display / non-display

  • Period :

    2009.10
    -
    Today

    Contents of activities : Control of Air Pollution From Mobile Sources