The closure of signalized intersections and the rerouting of traffic into midblock U-turn median openings paved the way for free-flow traffic conditions in an intersection. However, direct left turn vehicles will now have to take a series of right-turn plus U-turn manoeuvres in order to duplicate the same path taken prior to the closure. As a consequence, right-turn plus U-turn vehicles must weave across into the innermost lane towards the U-turn. Currently, methods for analysing the speeds in the weaving segment were derived exclusively on freeway weaving sections. The weaving manoeuvre that closely compares to the weaving of a right-turn plus U-turn vehicle is the two-sided Type C freeway weave. The ramp weave model developed by Messer and Bonneson was used to predict weaving and non-weaving speeds. Results of the calibrated models accurately predicted the observed speeds with a 95 per cent level of confidence. The resulting models can be used to estimate weaving and non-weaving speeds and eventually the capacity in the weaving sections in other sites in Metro Manila having the same configuration. (a) For the covering record of the conference, please refer to ITRD no. E218380.
Abstract