Abstract

GARCIA-RAMIREZ, Yasmany  and  PALADINES, Luis. Operating Speed Models Calibration in Urban Streets without traffic light: A Case Study. Rev Politéc. (Quito) [online]. 2018, vol.40, n.2, pp.41-46. ISSN 2477-8990.

Operational speeds can be obtained using field measurements or prediction equations; these are often the most used, taking into account that for the field measurements require devices and qualified people. This calibration process of equations has not yet been made for Latin American cities; in consequence, the aim of this study was to calibrate models of operating speed in urban lines prior to intersections without traffic light. For this, light vehicle speeds were collected with 45 drivers, using the GPS Garmin Dash Cam 20, in 13 stretches in Loja city (Ecuador). In addition, data related to the geometric characteristics of the street, street environment, driver and vehicle were collected. As a result, the statistically significant variables were: the tangent length, the speed of the start of the maneuver and the speed of the end of the maneuver for the speed, acceleration and deceleration, respectively; with which prediction models were calibrated and validated. There was no significant relationship between the variables related to the driver-vehicle and the speed of operation; which suggests that the choice of speed in this type of streets depends mainly on the characteristics of the street. The obtained models will help to reduce the difference between the design speed and operating speed during the process of designing urban streets in the country and in streets with similar characteristics to those employed in this study.

Keywords : operating speed models; tangents; intersections without traffic lights; GPS; Loja (Ecuador).

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