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Traffic safety--Sri Lanka (3)
Traffic safety--Thailand (9)
Traffic safety--Thailand--Bangkok (2)
Traffic safety--Thailand--Evaluation (1)
Traffic sign and signals (1)
Traffic signs and signals (9)
Traffic signs and signals--Bangkok (2)
Traffic signs and signals--Control systems (2)
Traffic signs and signals--Mathematical models--Thailand--Bangkok (1)
Traffic signs and signals--Sri Lanka--Colombo (2)
Traffic signs and signals--Thailand (2)
Traffic signs and signals--Thailand--Bangkok (1)
Traffic signs and signals--Thailand--Bangkok--Design and construction (1)
Traffic signs and signals--Thailand--Evaluation (1)
Traffic signs and signals--Thailand--Vipawadi Rangsit Highway (1)
Traffic simulation (1)
Traffic surveys (1)
Traffic surveys--Data processing (1)
Traffic surveys--Thailand (1)
Traffic surveys--Thailand--Bangkok (3)