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为分析多源出行信息对驾驶员认知负荷的影响机制,设计包含可变信息板(VMS)、交通广播以及这两者相结合的3种模拟驾驶场景,通过建立驾驶员认知负荷测评量表,采集驾驶仿真试验及认知负荷量表数据,测度多源信息影响下的驾驶员认知负荷。结果表明:3种场景中的出行信息均会影响驾驶员的认知负荷,单一VMS场景的认知负荷最低,多源信息场景最高;单一VMS场景中信息搜寻的认知负荷低于交通广播,获取和决策过程则高于交通广播;多源出行信息对认知负荷的影响维度主要是脑力负荷和时间负荷;出行经验对认知总负荷的影响与场景相互独立。
In order to analyze the influence mechanism of multi-source travel information on driver cognitive load, three simulation driving scenarios including variable message board (VMS), traffic broadcast and the combination of the two were designed. By establishing driver cognitive load assessment Table, driving simulation test and cognitive load scale data were collected to measure the driver’s cognitive load under the influence of multi-source information. The results show that: the travel information in all three scenarios will affect the driver’s cognitive load, the single-VMS scenario has the lowest cognitive load and the highest multi-source information scenario; the cognitive load of information search in a single VMS scenario is lower than that of traffic broadcast, Acquisition and decision-making process is higher than traffic radio; Multi-source travel information on the impact of cognitive load dimensions are mainly mental load and time load; travel experience on cognitive total load and scene independent of each other.