In-car tactical advice using delayed detector data

In-car tactical advice is advice that is given in-car concerning the tactical scale, e.g. lane changing and desired speed and headway, and that has been shown to reduce travel time delay. We assess the effects of detector data delay on traffic state prediction and on the effectiveness of in-car tactical advice using microscopic simulation. Interestingly, effectiveness does not reduce with data delays from 0s up to 180s, indicating that for the presented case, congestion is predicted with sufficient accuracy. However, estimation errors in speed and flow increase, and accuracy of advices (including false negatives and positives) decreases. Consequently, compliance, and as a result effectiveness, may be expected to reduce for larger data delay. This paper shows that in-car tactical advice may reduce travel time delay with about 33% even if drivers are attentive and relatively efficient without advice.