TA Engineering (General). Civil engineering (General) 191 TE Highway engineering. Roads and pavements 66 TJ Mechanical engineering and machinery 62 Roads and streets 58 human 32 TK Electrical engineering. Electronics Nuclear engineering 29 Motor transportation 25 QA75 Electronic computers. Computer science 25 Vehicles 25 Malaysia 24 China 22 HE Transportation and Communications 19 article 18 Road safety 16 Traffic congestion 16 Accidents 15 adult 15 female 15 machine learning 15 Economics 14 Humans 14 T Technology (General) 14 History 13 Sustainable development 13 NA Architecture 12 Surveys 12 male 12 Accident prevention 11 Developing countries 11 Intelligent systems 11