In Rotterdam, a Dynamic Route Information Panel (DRIP) will be installed that informs drivers about the current travel time on a route in an urban region. TNO Inro has developed the underlying algorithm which is generally applicable for estimating current travel times on routes in urban areas. The algorithm uses online measurements of traffic counts, cycle times and green times for estimating travel time on a individual link in an urban network. Distinction is made between free flowing traffic, delays due to the presence of traffic lights, and delays due to the presence of other traffic (queues) at junctions with traffic lights. The link travel times of all links of a route are then added to yield the route travel time. This report is the first part of the specification of the algorithm. It describes the general computational kernel of the algorithm. The second part of the specification describing the preprocessing and postprocessing modules of the algorithm is reported in a separate report (See C 16052 (ITRD E203596) (A)
Abstract