Understanding the growing role of driving anger in the risk of traffic incidents involving Vietnamese motorcyclists

This study validates the Vietnamese versions of the Driving Anger Scale and Driving Anger Expression Inventory, two prominent instruments for determining driving anger proneness and expression. Using these scales, the authors investigate the relationships between driving anger and motorcyclists' on-road risks in Vietnam. Factor analyses are conducted to explore the dimensional constructs of the two scales with a dataset of 960 Vietnamese motorcyclists. The t-tests were applied to assess the differences in driving anger levels between motorcyclists' subgroups. Negative binomial regression is used to predict the probability of motorcyclists' traffic incidents based on driving anger factors and individual differences. The Vietnamese Driving Anger Scale has three factors, including Hostile gestures (α=.78), Unpleasant conditions (α=.80), and Traffic violations (α=.74). Hostile gestures elicit the most driving anger among Vietnamese motorcyclists. Besides, females report higher propensities for driving anger than males over three anger-provoking factors. The Driving Anger Expression Inventory has a two-factor structure, including Aggressive expressions (α=.83) and Adaptive expressions (α=.74). Vietnamese motorcyclists are more prone to have adaptive expressions than aggressive expressions when angry on-road. The regression results reveal the significant effects of gender and two factors of the Driving Anger Expression Inventory on the probability of traffic incidences. Females have considerably fewer traffic accidents and offenses than males. Besides, the number of minor crashes and violations grows by 1.54 and 1.93 times with each unit rise of the Aggressive expressions factor. Increasing adaptive expression level is associated with a decrease in the numbers of major crashes and offenses (40% and 19% less, respectively). This study provides insights into driving anger in Vietnam, a motorcycle-dominant country. The findings corroborate the Vietnamese versions of the Driving Anger Scale and Driving Anger Expression Inventory, which contributes to understanding the formation and expression of driving anger and its roles in predicting driving outcomes. Furthermore, the higher on-road risks of males and motorcyclists with more aggressive expressions are highlighted. Generally, enhancing the risk perception about driving anger and promoting the advantages of on-road adaptive expressions may significantly reduce traffic issues in Vietnam.本研究对驾驶愤怒量表（Driving Anger Scale）与驾驶愤怒表达量表（Driving Anger Expression Inventory）的越南语版本进行了效度验证，二者均为衡量驾驶愤怒倾向与表达的主流测评工具。研究团队依托上述量表，以越南摩托车骑手群体为对象，探究驾驶愤怒与道路骑行风险间的关联。本研究纳入960名越南摩托车骑手的数据集，通过因子分析探索两份量表的维度结构，并采用t检验评估不同摩托车骑手亚组间的驾驶愤怒水平差异。本研究采用负二项回归模型，基于驾驶愤怒因子与个体差异变量预测摩托车骑手交通事故的发生概率。越南语版驾驶愤怒量表包含三个维度，分别为敌意手势（克朗巴赫α=0.78）、不悦情境（克朗巴赫α=0.80）与交通违规（克朗巴赫α=0.74）；其中敌意手势最易引发越南摩托车骑手的驾驶愤怒情绪。此外，在三类愤怒诱发因素下，女性骑手报告的驾驶愤怒倾向显著高于男性骑手。越南语版驾驶愤怒表达量表则具有双维度结构，分别为攻击性表达（克朗巴赫α=0.83）与适应性表达（克朗巴赫α=0.74）；越南摩托车骑手在道路骑行中产生愤怒情绪时，更倾向于采用适应性表达而非攻击性表达。回归分析结果显示，性别与驾驶愤怒表达量表的两个维度均对交通事故发生概率存在显著影响。女性骑手的交通事故与交通违法次数显著少于男性骑手。具体而言，攻击性表达维度每提升1个单位，轻微碰撞与交通违规的发生风险分别升高1.54倍与1.93倍；而适应性表达水平的提升则与严重碰撞及交通违法次数的减少相关，二者分别降低40%与19%。本研究针对以摩托车为主要出行方式的越南，深入剖析了当地的驾驶愤怒现象。研究结果验证了越南语版驾驶愤怒量表与驾驶愤怒表达量表的效度，有助于进一步理解驾驶愤怒的形成与表达机制，及其在预测驾驶行为结果中的作用。此外，本研究明确了男性骑手与攻击性表达水平较高的骑手所面临的更高道路风险。总体而言，提升对驾驶愤怒的风险认知，推广道路骑行中的适应性表达策略，或可有效缓解越南的道路交通问题。