“…The most common vehicle types are buses (n = 14: [ 3 , 4 , 5 , 6 , 8 , 12 , 17 , 41 , 42 , 43 , 44 , 45 , 49 ]), followed by trucks (n = 5: [ 2 , 9 , 14 , 48 , 50 ]), taxis (n = 4: [ 7 , 15 , 24 , 47 ]), or various vehicles (n = 3: [ 16 , 18 , 46 ]). The studies cater to various settings, with urban/city being the most common (n = 7: [ 3 , 12 , 15 , 17 , 41 , 42 , 44 ]), followed by highways (n = 2: [ 2 , 50 ]), city (n = 2: [ 5 , 8 ]), long-distance (n = 2: [ 9 , 16 ]), urban/rural (n = 1: [ 24 ]), asphalt and cobble surfaces (n = 1: [ 45 ]), intercity/intracity (n = 1: [ 6 ]), deep sea port/road (n = 1: [ 48 ]), and smooth/rough urban, suburban, rural, regional, industrial (n = 1: [ 49 ]). Six studies [ 4 , 7 , 18 , 43 , 46 , 47 ] do not state the setting.…”