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Evaluation of pedestrian crossing speed change patterns at unprotected mid-block crosswalks in India

Journal of Traffic and Transportation Engineering(English Edition) 2020年第6期7卷 832-842页

作者： B.Raghuram Kadali P.Vedagiri Department of Civil Engineering National Institute of Technology WarangalWarcmgal 506004India Department of Civil Engineering Indian Institute of Technology BombayMumbai 400076India

The pedestrian crossing speed is one of the important factors in pedestrian crossing facility *** studies have shown that the pedestrian crossing speed is influenced by availability of green time at signalized crosswalks and pedestrian characteristics such as gender and ***,the effects of vehicular time gap and additional pedestrian behavioural characteristics on pedestrian crossing speed patterns have not been examined at unprotected(un-signalized)mid-block *** present study examines the pedestrian crossing speed change patterns considering the effect of vehicular time gap and pedestrian behavioural characteristics such as rolling behaviour,path change,etc.,at selected unprotected mid-block crosswalk locations under mixed traffic conditions in *** graphic survey has been conducted at eight selected unprotected mid-block crosswalk locations in Mumbai City for two to three hours duration during normal weather *** data was mined using AVS video editor software,and the extracted data includes pedestrian speed,pedestrian characteristics(gender and age),pedestrian behaviour(rolling behaviour,path change,etc.),vehicle characteristics(type and speed of the vehicle)and traffic *** crossing speed change patterns(whether pedestrian is changing speed or not while crossing a road)was considered as a binary variable and a logistic regression model was developed with vehicular gaps and other pedestrian behavioural characteristics as independent *** results revealed that there is a reduction in pedestrian crossing speed change behaviour with an increase in vehicular gap size at unprotected mid-block *** younger pedestrians have more probability of exhibiting crossing speed change patterns as compared to the elderly pedestrians at mid-block ***,it is identified that there is an increase in pedestrian crossing speed with increase in vehicle speed as well as heavy vehicle type

关键词： Pedestrian behavior Crossing Speed patterns mid-block Vehicle gap

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Evaluation of pedestrian mid-block road crossing behaviour using artificial neural network

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Journal of Traffic and Transportation Engineering(English Edition) 2014年第2期1卷 111-119页

作者： B Raghuram Kadali Nivedan Rathi Vedagiri Perumal Department of Civil Engineering Indian Institute of Technology Bombay

Pedestrians usually cross the road at mid-block locations in India because of the ease and convenience to reach their destination as compared to intersection locations. It is important to evaluate the pedestrian gap acceptance behavior at mid-block locations because of inadequate vehicular gaps un- der mixed traffic condition, which translates into the pedestrian road crossing behavior. The present study examines the pedestrian gap acceptance behaviour by employing an artificial neural network （ANN） model for understanding the decision making process of pedestrians, i. e. , acceptance or rejec- tion of vehicular gaps at a mid-block location. From the results it has been found that the pedestrian rolling gap, frequency of attempt, vehicular gap size, pedestrian speed change condition and vehicle speed have major role in pedestrian gap acceptance. These results can lead to a better design of pedestrian crossing facilities where adequate gaps are not available in vehicular flow at mid-block crosswalk locations.

关键词： pedestrian mid-block artificial neural network rolling gap gap acceptance behavior

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Analyzing Pedestrian Fatality Risk in Accidents at mid-blocks

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Journal of Transportation Technologies 2019年第2期9卷 171-192页

作者： Yanyan Chen Jiajie Ma Ning Chen College of Metropolitan Transportation Beijing University of Technology Beijing China

Objective: Pedestrian safety is considered as one of the greatest concerns, especially for developing countries. In the year of 2015, about 48% pedestrian accidents with 56% fatalities occurred at mid-blocks in Beijing. Since the high frequency and fatality risk, this study focused on pedestrian accidents taking place at mid-blocks and aimed at identifying significant factors. Methods: Based on total 10,948 crash records, a binary logit model was established to explore the impact of various factors on the probability of pedestrian’s death. Furthermore, first-degree interaction effects were introduced into the basic model. The Hosmer-Lemeshow goodness-of-fit test was used to assess the model performance. Odds ratio was calculated for categorical variables to compare significant accident conditions with the conference level. Variables within consideration in this study included weather, area type, road type, speed limit, pedestrian location, lighting condition, vehicle type, pedestrian gender and pedestrian age. Results: The calibration results of the model show that the increased fatality chances of an accident at mid-blocks are associated with normal weather, rural area, two-way divided road, crossing elsewhere in carriageway, darkness (especially for no street lighting), light vehicle, large vehicle and male pedestrian. With road speed limit increasing by 10 km/h, the probability of death accordingly increases by 46%. Older victims have higher chances of being killed in a crash. Moreover, three interaction effects are found significant: rural area and two-way divided, rural area and crossing elsewhere as well as speed limit and pedestrian age. Conclusions: This study has analyzed police accident data and identified factors significant to the death probability of pedestrians in accidents occurred at mid-blocks. Recommendations and improving measures were proposed correspondingly. Behaviors of different road users at mid-blocks should be taken into account in the fut

关键词： Pedestrian Accident mid-block Fatality Risk Logistic Regression

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