Exploring Unobserved Heterogeneity in Cyclists’ Occupying Motorized Vehicle Lane Behaviors at Different Bike Facility Configurations

Cyclists occupying motorized vehicle lanes disrupt road traffic order and increase collisions. Exploring the contributing factors could help develop countermeasures to regulate such behaviors. The purpose of this study is to explore the intrinsic features influencing the behavior of cyclists in occupying motorized vehicle lanes at different bicycle facilities. We investigated a total of 34,631 cycling behavior samples in the urban area of Pingdingshan, China. A Bayesian random parameter logit model was used to account for the unobserved heterogeneous effects. The experimental results of all bike facilities demonstrate that the bike type, dividing strip type, bike lane width, temporary on-street parking, and whether it is a working day significantly affect cyclists’ occupying motorized vehicle lane behaviors. Factors associated with unobserved heterogeneity are age, barriers dividing strip, vehicle lane numbers, bike volume, vehicle volume, and daily recording time intervals. Comparing the estimated model of five type bike lane facilities across different dividing strips, we find that cyclists have a significantly different occupying probability and the heterogeneity factors of the various bike facilities also have their focus. When the non-motorized road conditions become more open, the cyclist behavior becomes more random and the heterogeneity factors become broader.

School Safe Route in Sumbersari District, Jember Regency

The number of underage accidents in Jember Regency in 2011-2012 increased from 37 to 190 cases. Therefore, bicycle and pedestrian paths were planned through the School Safe Route program that could encourage students to choose to ride a bicycle or walking. The method of this study was the Level of Service analysis (LOS), student and travel characteristics, cross tabs, bicycle lanes, pedestrians, and road equipment facilities. The results showed that the level of road service on each road section varied, including LOS A, B, D and E. The characteristic and common cross tabs analysis results showed that most transportations used by students were motorcycles. Still, there was a relatively large proportion of students’ willingness to change their transportation mode in operational conditions if bicycle and pedestrian path facilities were provided. Cycle path analysis showed that the types of bicycle lanes were planned, specifically type A and C, with a bicycle lane width was 1.44 m for each lane. From the calculation of the minimum effective width of the sidewalk obtained 1.01 m with a crossing facility in the form of a pelican crossing with waiting stalls. Several road equipment facilities were planned, such as traffic signs, road markings and Traffic Signaling Equipment (TSE). Bicycle and pedestrian routes were planned at Tawang Mangu Street, Danau Toba Street, Mastrip Barat Street, Kalimantan Street, Jawa Street, Karimata Street, M.T. Haryono Street, Letjen S. Parman Street, Letjen Panjaitan Street and Letjen Suprapto Street.

ASSESSMENT OF TRAVEL SPEED FOR URBAN STREETS USING GLOBAL POSITIONING SYSTEM

The travel speeds selected and trusted by the driver vary according to his behavior and the surrounding environment. Accordingly, this paper studies the change of the free-flow speed, influences on it, of the route linking Al-Bayaa and Bab Almudam sectors. A GPS device was used to collect data during 60 rounds for three periods (morning, day, and night), 50 of them during the off-peak time and 10 during peak time with drivers of both genders and different ages. The results showed a variation of the FFS values at off-evening peak time, also noting the posted speed limits corresponding to the statistically calculated 85, which was 69km\hr. along the route. The emergence of a significant impact of the security checkpoints in link 3, causing a general defect in the traffic accounts. Also, there was an increase in the speed with an increase in lane width by 13% and a decrease in the speed with an increase in the number of lanes by 45.18% and 18.6% between 2 and 4 lanes and 2 and 3 lanes respectively. It should be noted that male is bolder and more reckless in choosing speeds by 26.32% than female and that groups of 50 and below years old choose less speed by 13.52% of ages 35 and below years old who are more confident and familiar in dealing with roads and choosing the appropriate speed.

EVALUASI KONDISI PERKERASAN JALAN NASIONAL SERTA ALTERNATIF PENANGANANNYA (STUDI KASUS : JALAN DAAN MOGOT)

Daan Mogot street is part of the National Road Route One (1). Daan Mogot street (Section Number: 2000111) under study is a 2.5 KM two-way four-lane flexible pavement road, with a lane width of 3.5 m. The location chosen is the point of the worst congestion on Daan Mogot street, with the most road damage conditions. The purpose of this study is to analyze the condition of the road pavement and what treatment should we do for the damage on Daan Mogot street. The stages in this road pavement research are divided into 2 stages, firstly calculating the damage on the road, and choose alternative treatment using existing methods. The method used is the Pavement Condition Index (IKP) method and evaluates the handling of damage in the last 3 years. The result of the research is that the most damage is patch and hole damage, and the IKP value for each research unit can be seen that the pavement quality varies, from the level of Very Poor, Poor, Fair, Satisfactory, to Good. The average IKP value on Daan Mogot street in the direction of Tangerang from KM +14,000 to KM+16,500 is 87.09 with a Good condition class. ABSTRAKJalan Daan Mogot merupakan bagian dari Jalan Nasional Rute Satu (1). Jalan Daan Mogot (Nomor Ruas : 2000111) yang diteliti merupakan jalan dengan perkerasan lentur sepanjang 2,5 KM dua arah empat lajur, dengan lebar perlajur 3,5 m. Lokasi yang dipilih merupakan titik kemacetan terparah di Jalan Daan Mogot, dengan kondisi kerusakan jalan terbanyak. Tujuan penelitian ini untuk menganalisis kondisi perkerasan jalan dan penanganan apa yang harus kita lakukan terhadap kerusakan yang terjadi di Jalan Daan Mogot. Tahapan dalam penelitian perkerasan jalan ini dibagi menjadi 2 tahapan yaitu, pertama menghitung kerusakan yang ada di jalan tersebut, dan menentukan alternatif penanganan yang tepat dengan menggunakan metode-metode yang ada. Metode yang dipakai adalah metode Indeks Kondisi Perkerasan (IKP) dan melakukan evaluasi penanganan kerusakan dalam 3 tahun terakhir. Hasil penelitian yang diperoleh adalah kerusakan terbanyak ada pada kerusakan tambalan dan lubang, serta nilai IKP untuk masing masing unit penelitian dapat diketahui kualitas perkerasan beragam, dari tingkat Sangat Parah, Parah, Sedang, Baik, hingga Sangat Baik. Hasil rata-rata nilai IKP Jalan Daan Mogot arah Tangerang dari KM +14,000 s/d KM+16,500 adalah 87,09 dengan kelas kondisi Sangat Baik.

Research on the Evolution Mechanism of Congestion in the Entrances and Exits of Parking Facilities Based on the Improved Spatial Autoregressive Model

The entrance and exit area of parking facilities has the characteristics of high concentration of urban traffic and prominent traffic intertwining phenomenon, which easily induces rapid congestion of mixed heterogeneous traffic at specific times and local locations and quickly spreads to the entire road section or even a larger area. In order to better understand the congestion distribution characteristics and propagation effects of access section of the parking entrance and exit from the mid and microperspective, a 5 m ∗ lane width pixel grid is used to divide the frontage road research. It also proposes a spatially robust autoregressive model and complex network tools suitable for analysis of local traffic flow to analyze it. The results show that as spatial scale increases, the congestion propagation decreases sharply and spatial adjacency within the fourth order can account for more than 90% of the propagation; the frontage road to the entrance and exit is the place where the congestion first happens, and the congestion gradually attenuates as it propagates to the inner lane and the upstream of the road segments; the lateral congestion propagation attenuates faster, so the area affected by congestion is mainly distributed in the outermost lane. This paper can provide theoretical guidance for alleviating traffic congestion in the entrance and exit areas of parking facilities and has theoretical and empirical significance.

Evaluating Satisfaction in Shared Lanes as Part of Sustainable Transport Infrastructure by Using VR Technology – Evidence from Urban China

The concept of sharing transport infrastructure has become increasingly prominent in the sustainable society due to limited resources in urban cities. Shared lanes where cars, electric motorcycles, and bicycles are permitted have been promoted in urban China to overcome the shortage of road space available to meet the increasing traffic demand. Based on VR video and questionnaire survey, this study has identified that the levels of satisfaction of drivers, e-motorcyclists, and cyclists are associated with the factors of traffic condition and lane characteristics among various shared lanes. Based on the analysis of data by a multinomial ordered logistic regression model, the major findings of this study are summarised as follows: (1) Satisfaction was mainly affected by lane width, lane number, lane type, and presence of parking space in the driver group. (2) Lane width, lane number, lane type, presence of parking space, speed, and lateral separation were the main factors in the e-motorcyclist group. (3) For the group of cyclists, lane width, lane number, presence of slope, presence of parking space, speed, and lateral separation were identified as the main factors. Our study will help local government officials to design more effective sustainable transport infrastructures.

An Analysis of Vulnerable Road Users Overtaking Maneuver along the Urban Road

This paper discusses driving styles while overtaking a vulnerable road user who moves along the shoulder in urban roads. Based on the data obtained from an experiment in pre-defined conditions (combinations of four main effects: vehicle’s initial speed, lane width of the road, vulnerable road users’ type, and location in the shoulder) with an immersive driving simulator, we analyzed four different driving styles of drivers while approaching and passing the objects. It is shown that drivers took avoidance maneuvers even if there was no clear risk of collision to vulnerable road users. The results showed that the drivers tended to have a unique perception about the lateral passing gap and overtaking strategy with two worth notice groups: overcaution drivers and reckless drivers. The road characteristic has a statistically significant effect for all types of drivers. Moreover, the effect of the vehicle’s initial speed on overtaking strategy and the effect of vulnerable road user location on minimum lateral passing gap are statistically significant. The findings provide some implications for the development of automotive safety systems that can reduce the risk of overtaking maneuvers in urban areas.