Driving with intelligent speed adaptation: Final results of the Belgian ISA-trial

Abstract

In October 2002 the first ISA-trial in Belgium was started in Ghent. Thirty-four cars and three buses were equipped with the ''active accelerator pedal''. In this system a resistance in the accelerator is activated when the driver attempts to exceed the speed limit. If necessary, the driver can overrule the system. The main research goals of the trial in Ghent were to evaluate the effects of ISA on speed-change, traffic safety, drivers' attitude, behaviour and drivers' acceptance. To study these effects of the ISA-system both surveys and logged speed data were analyzed. In the surveys drivers noticed that the pedal assisted them well in upholding the speed limits and that the system increased driving comfort. Most important drawbacks were technical issues. Data analysis shows a reduction in the amount of speeding due to the ISA-system. There is however still a large remaining percentage of distance speeding, especially in low speed zones. Differences between drivers are large. For some drivers speeding even increases despite activation of the system. For less frequent speeders average driving speed almost always increases and for more frequent speeders average speed tends to decrease. With the system, less frequent speeders tend to accelerate faster towards the speed limit and drive exactly at the speed limit instead of safely below, which causes average speeds to go up.

Towards defining a unified concept for the acceptability of Intelligent Transport Systems (ITS): A conceptual analysis based on the case of Intelligent Speed Adaptation (ISA)

“…Overview of different types of ISA (Morsink et al, 2006)] In most ISA studies, acceptance and acceptability refer to the opinions, attitudes, and values of the users relative to the experience they had when driving with the system (Brookhuis & De Waard, 1999;Comte et al, 2000;Vlassenroot et al, 2007;Young & Regan, 2007). In these studies, acceptance is measured by comparing behavioural changes when driving without ISA before using the device and driving with ISA and finally driving without ISA after the test period (Adell et al, 2008;Biding & Lind, 2002;Hjalmdahl & Varhelyi, 2004;Katteler, 2005).…”

Auditory Intelligent Speed Adaptation for Long-Distance Informal Public Transport In South Africa

“…Several simulation experiments [16], [17] and field tests [18], [19], [20], [21], [22] have been conducted to evaluate the impact of different ISA systems on driver behaviour [23]. In general, these systems have resulted in speed limit compliance through reduced speed variances, maximum speeds, and the percentage of time spent driving above posted speeds.…”

“…Speed percentile rankings are another metric used to quantify driving behavioural changes, and have been used in previous studies to measure the effectiveness of ISA systems [21], [16]. This section presents 85th percentile speeds, and relevant speed percentile crossings for the different warning intensities as shown in Fig.…”

Combining Semi-autonomous Navigation with Manned Behaviour in a Cooperative Driving System for Mobile Robotic Telepresence

“…Another possible solution to coping with inexperienced users is to provide certain semi-autonomous functions that can predict and avoid possible hazardous situations. Such systems are growing rapidly for example in automotive industry [11] [12].…”