where can I adjust emoji suggestions in iOS10
You can't. This data is hard-coded in /System/Library/PrivateFrameworks/CoreEmoji.framework in the file FindReplace.strings.

However, you can use those files on macOS to look up the keywords that differentiate the various cars. Here they are, I have made bold the unique words that can be used to summon each type of car.


race car, racing car, formula 1, formula one


police, cop


police, police car, cop


(not available)


taxi, cab, taxi cab


car, automobile, hatchback, vehicle


car, sedan


car, jeep, SUV, automobile


trolley, tram, street car