{'fraction_non_alphanumeric': 0.016428571428571428, 'fraction_numerical': 0.004285714285714286, 'mean_word_length': 5.012875536480687, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Operating speed models for two-lane rural roads in Pakistan

One of the most suitable techniques used to improve safety on roads is to check the consistency of geometric design. However no research has been found reported to date for design consistency in Pakistan. The most common parameter for the evaluation of design consistency is through the use of operating speed. Therefore, modelling operating speed on highway alignment is a very important step to implement design consistency in the design process. Several models have been developed to predict operating speed on two-lane rural roads. In this study continuous speed profile data, along the entire length of the selected test section, was collected using a vehicle equipped with a GPS based device. The speed profiles, resulting from continuous tracking of the vehicle, make it possible to measure true operating speed along the selected test section and detailed information of driver behaviour such as speed variation, maximum and minimum speed. The model was developed for prediction of operating speed on horizontal curves and validation of the developed model shows compatibility with the trend of experimental data. Hence the developed speed prediction model can be used to evaluate consistency of new and existing two-lane rural roads in Pakistan. (a) For the covering entry of this conference, please see ITRD abstract no. E216298.