2011
DOI: 10.1007/s13177-011-0043-z
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Analysis of Car-following Behavior on Sag and Curve Sections at Intercity Expressways with Driving Simulator

Abstract: We analyzed the influence of road alignments such as sags and curves and the leading vehicle's behavior on carfollowing behavior in a driving simulator experiment. Parameters of a car-following model were estimated from following-vehicle trajectory data collected for 37 participants. Then, relationships between the parameters and environmental factors were analyzed. The results showed that the parameters of the following-behavior model were significantly influenced by expressway alignments such as sags and cur… Show more

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Cited by 23 publications
(27 citation statements)
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“…In general, the bottleneck is located 500 to 1000 m downstream of the bottom of the sag [3]. The factors reducing the capacity of sags seem to be related primarily to two changes in car-following behavior that occur when vehicles go through the vertical curve: i) drivers tend to reduce speed [1,3,4]; and ii) drivers tend to keep longer headways than expected given their speed [5,6,7]. These changes in car-following behavior seem to be unintentional [6].…”
Section: Causes Of Congestion At Sagsmentioning
confidence: 99%
See 3 more Smart Citations
“…In general, the bottleneck is located 500 to 1000 m downstream of the bottom of the sag [3]. The factors reducing the capacity of sags seem to be related primarily to two changes in car-following behavior that occur when vehicles go through the vertical curve: i) drivers tend to reduce speed [1,3,4]; and ii) drivers tend to keep longer headways than expected given their speed [5,6,7]. These changes in car-following behavior seem to be unintentional [6].…”
Section: Causes Of Congestion At Sagsmentioning
confidence: 99%
“…The factors reducing the capacity of sags seem to be related primarily to two changes in car-following behavior that occur when vehicles go through the vertical curve: i) drivers tend to reduce speed [1,3,4]; and ii) drivers tend to keep longer headways than expected given their speed [5,6,7]. These changes in car-following behavior seem to be unintentional [6]. They are caused by a decrease in vehicle acceleration resulting from the combination of two factors: i) increase in resistance force; and ii) insufficient acceleration operation by drivers [1,6].…”
Section: Causes Of Congestion At Sagsmentioning
confidence: 99%
See 2 more Smart Citations
“…For example, in Japanese intercity freeways, 60% of traffic jams occur at sags [10]. The main cause of congestion appears to be that most drivers do not accelerate enough as they move along the vertical curve [11]. Consequently, they keep longer headways than expected given their speed [5].…”
Section: Introductionmentioning
confidence: 99%