Straight is similar to Conventional. Conventional is similar to Traditional. Traditional is similar to Classical. Classical is related to Music. 
Ride is related to Passenger. Passenger is a different concept from Driver. Driver is related to Operator. 
Straight <--SimilarTo--> Conventional <--SimilarTo--> Traditional <--SimilarTo--> Classical <--RelatedTo--> Music 
Ride <--RelatedTo--> Passenger <--DistinctFrom--> Driver <--RelatedTo--> Operator 