关键词: 公路运输, 单义标志, 标志间距, 短时记忆模型, 驾驶模拟

Abstract: Traffic signs repetition intervals influence their effects. Large intervals increase the burden of the driver’s mental and small intervals lead to waste of social sources. Large intervals may not reasonable and suitable for reminding drivers. Small intervals will not meet the expectation. Short-term memory characteristics and drivers’ safety performance are applied to locate single-mean signs. In order to explore drivers’ short memory characteristics, 42 samples are selected to participate indoor test in driving simulator. Exponential model is established based on the test performance. Results show that the short term memory decreased by 4% percent in the first 35 seconds and gradually became stable after 35s, decreasing by 3%. Memory accuarcy went down to 50%.Single mean traffic intervals on highway are calculated according to the short-term memory model and different operating speed.

Key words: highway transportation, single-mean signs, intervals, short-term memory model, driving simulator