Pak adds 239 new motorcycles to the traffic in a separate pack:

List
Chevrolet Blazer, Tahoe ('07, '15), Caprice, Cruze, Malibu, Silverado ('07, '18), Colorado ('07, '15), Avalanche, Trailblazer, Spark, Cobalt, Impala ('96, ' 03, '06), Suburban '98, HHR, Camaro, Corvette
Dodge Grand Caravan, Neon, Dart, Intrepid, Caravan, Caliber, Journey, Durango ('99, '11), Ram (1500, 2500, 3500), Charger ('06, '12), Challenger
Ford F150 ('93, '10, '18), F350, Taurus, Focus, Fusion, Mustang ('95, '13), Ranger, Escape ('08, '13), Explorer ('96, '10), Expedition, Flex, Fiesta, E150, F250 (service)
Chrysler PT Cruiser, 300C ('08, '12), LHS, Pacifica
Jeep Wrangler, Liberty, Grand Cherokee
GMC Yukon ('00, '07), Savana, Canyon, Envoy, Vandura, Sierra, Jimmy
Cadillac CTS ('04, '10), XTS, XT4
Pontiac G8, Sunfire
Plymouth grand voyager
Oldsmobile Cutlass Ciera, Alero
Buick roadmaster
Mercury tracer
Saturn ion
Lincoln Town Car, MKX, Navigator
Hummer h3
Toyota Tundra, Camry ('97, '07, '18), Corolla ('95, '08), Land Cruiser (100, 200), Highlander, Rav4, Yaris, C-HR, Prius C
Lexus GS, IS (XE10, XE20, XE30), LS, CT, LX
Scion xD, tC ('05, '12), xB
Honda Fit, Civic ('07, '12, '19), CR-V ('01, '07, '15), Odyssey, Insight, Pilot
Nissan Altima, Sentra, Frontier, Murano, Maxima '97, Leaf, Versa, Juke, Titan, Hardbody
Hyundai Sonata, Santa Fe, Tucson, Veloster, Elantra, Genesis
Infinity Q50, G35, G37, XF50
Kia Sportage, Soul, Forte Koup, Stinger, Sedona
Mitsubishi Montero, Outlander, Lancer, Galant
Subaru Legacy ('05, '10), Forester
Mazda 3 ('12), 6 ('06, '08, '15), CX-3
Acura RDX
Suzuki liana
Triple E Commander
Mercedes-Benz C (W203, W204), E (W212, W213), S (W221, C217), R, CLA, GL, GLA, GLC (coupe), GLE (coupe), ML, Metris
Audi A3 (sedan), A4 (B6, B7, B8, B9), A5, A7, A8 (D4), Q7 ('08, '15), Q5, Q8
BMW 3 (E46, E92, F80), 5 (F10, G30), 7 (E65), X1 (E84), X3 (F25), X5 (F15), X6 (F16), i3
Volkswagen Jetta (4, 5), Golf 7, Beetle, Touareg, Tiguan, Arteon
Volvo S60 ('04, '11, '19), V60, XC90'17, 850 (wagon)
Porsche Cayenne, Macan, Panamera, Panamera Sport Turismo
Land Rover Evoque LR3
Saab 9-3 ('02, '08), 9-7x
Jaguar F-Pace, XE
Maserati Ghibli, Levante
Mini Clubman, Cooper Roadster
Fiat 500
Smart fortwo

Everything is spelled out separately, does not replace anything.
The pack includes real 3D logos for default cars.
Compatible with all Jazzycat packs.
For versions 1.35.x, 1.36.x

Converting models to the game and building the pack: Jazzycat

Version 8.3 for American Truck Simulator (v1.35.x, 1.36.x):

Added Cadillac CT6 '19, Land Rover Velar, redesigned lodges for Jeep Liberty (optimization).