Design of signal setting and advanced traveller information systems

This paper analyses the role of advanced traveller information systems (ATIS) in conjunction with signal setting (SS) design. ATIS and SS are considered as planning options for network optimisation under recurrent traffic conditions. The traffic network is considered in terms of within-day static conditions, as is usual for planning-oriented models. Both day-to-day static (equilibrium) and dynamic states are investigated. Notably, equilibrium and stability can influence the feasibility of SS solutions. In addition, the role of ATIS is assessed with regards to its suitability in equilibrating SS optima and/or stabilising SS equilibria. Travellers’ compliance with information, which plays a crucial role in both optimisation and stabilisation, is explicitly modelled. A formal modelling framework is introduced, allowing SS and ATIS to be represented and several benefits and drawbacks of SS and ATIS options are explored. The model is then used for simulations on a hypothetical network. The results suggest the potential of the modelling framework and lead to non-trivial findings about the role of ATIS.