In a car, a rider is usually a passenger, not the driver.
Rider — Vocabulary
Answer from NVZ on Stack Exchangen. 1.a. a traveler who actively rides an animal (as a horse or camel)
n. 1.b. a traveler who actively rides a vehicle (as a bicycle or motorcycle)
n. 1.c. a traveler riding in a vehicle (a boat or bus or car or plane or train etc) who is not operating it
If I'm not a driver I cannot drive it, right?
In a car, a rider is usually a passenger, not the driver.
Rider — Vocabulary
n. 1.a. a traveler who actively rides an animal (as a horse or camel)
n. 1.b. a traveler who actively rides a vehicle (as a bicycle or motorcycle)
n. 1.c. a traveler riding in a vehicle (a boat or bus or car or plane or train etc) who is not operating it
I have to say that I have never come across rider when driver or passenger would be the accepted and common usage to cover a car. However, your question is interesting as I consider it perfectly correct to say, "He [neighbour] gave me a ride to work in his new car". To my way of thinking I remain a passenger in my neighbour's car and not a rider in this situation or context. . I wonder if we have a clash of American English versus British English here? In the UK it is common to ask someone if they would like a lift to work and this would be readily understood whether the mode of transport is a car or a motorcycle. However, I don't think lift would be understood in American English in this context whereas ride to work would be. But then the situation becomes even more complicated because we talk about a pillion passenger (BE) in the context of a person who sits behind the rider (the person in control) of a motorcycle.
Pillion passenger: A pillion is a mostly British English term for a...seat behind the main seat...[of a] motorcycle...A passenger (my emphasis) in this seat is said to "ride pillion"... (Wikipedia)
Most English speakers employ the French loanword “chauffeur” to describe this profession.
A chauffeur is a person employed to drive a passenger motor vehicle, especially a luxury vehicle such as a large sedan or limousine.
Source: Wikipedia entry for “Chauffeur”
You could also just say “driver”.
driver noun \ˈdrī-vər\
: a person who drives a car, truck, etc.
: a person whose job is to drive a vehicle (such as a taxi, truck, or bus)
Source: Merriam-Webster definition of “driver”
If they are people who work in hotels and performing services like this is a part of their job you can call them "hotel valet".
Saw another post saying it's a common thing to do in the Appalachians, driving without a destination. What would you call it?
I understand that you are making an observation about vehicles that are being driven and occupied by one person, and hoping to encourage more people to share rides, and thereby reduce overall traffic.
Interestingly,most of the existing terminology used in these situations actually relates to the driver, rather than the vehicle. This makes sense if you consider that the cause of the problem is not the vehicle, but in fact the problem is the driver and their choice to travel alone. Campaigns to improve the sharing of vehicles mostly direct attention to the driver behaviour. Common expressions in this case would include:
'solo-', 'sole-', and 'single-drivers',
'solo-', 'sole-', and 'single-commuters', and
'solo-', 'sole-', and 'single-rollers'.
There are expressions that relate to the vehicles, however, such as:
'Sole Occupant Vehicles (SOV)',
'Sole Occupancy Vehicles (SOV)',
'Single Occupant Vehicle (SOV)', and
'Single Occupancy Vehicle (SOV)'.
Using a term such as 'Single Occupant Vehicle', and its acronym 'SOV' creates as less emotive impression, and is particularly favoured in discussions about road design, including reducing access to 'Single Occupant Vehicles', or the creation of special access for 'High Occupancy Vehicles (HOV)'. See this report for example, from the University of Virginia: http://www.mautc.psu.edu/docs/UVA-2008-04.pdf.
You might note in the previous paragraph a mention of 'High Occupancy Vehicles (HOV)' which is the opposite of a 'Single Occupancy Vehicle'. There are also terms which describe the opposite of a 'Sole Commuter', such as:
'Ride Sharer',
'Car Pooler',
'Car Sharer', and
'Lift Sharer'.
Which also suggests such terms as: 'Ride Sharing', 'Car Pooling', 'Car Sharing' and 'Lift Sharing'. If you were considering a campaign to try to reduce traffic by reducing the number of 'Single Occupant Vehicles' or 'Solo Commuters' you could consider a campaign that was focussed on encouraging the opposite, such as:
'xyz town loves Ride Sharers',
'xyz town loves Car Pooling', or
'Ride Sharers are welcome in xyz town.'.
Most campaigns to encourage ride-sharing also include incentives in terms of reduced road tolls, parking fees, or preferential access onto high speed or high flow traffic lanes. Vehicles using these facilities are monitored - usually by camera - to ensure that Single Occupant Vehicles are excluded. This has led to instances where drivers have placed 'dummies' in their vehicles in order to create the impression that they are carrying real passengers, see: http://www.dailymail.co.uk/news/article-2593704/Worlds-laziest-HOV-lane-dummy-just-hat-t-shirt-seat.html
It is Deadhead(noun/verb). It stands for a trip without freight or paying passengers.
"The van is deadheading to the stand after dropping off the children"
"The deadhead trips are increasing traffic congestion".
Though I wonder why in your future world they would still allow people to drive (leave alone make/sell) such cars, talking academically you may use one of:
human-driven, manually driven, or perhaps, vintage car
You can mention the two opposite sets of cars as follows:
auto-driven cars/ driverless cars vs. manually driven cars/ human-driven cars.
I do not subscribe to the term "self-driven car" to mean a driverless car, as the term may, to many, mean a car not driven by the chauffeur, but by the owner himself.
I'm just curious about the various reasons some people choose not to get a driver's license.
Edit: I should clarify I'm American and where I live my only option to get around is to drive since there is no public transportation.