Roguish Archetype

Rogues have many features in common, but they often become specialists in their varying lines of work. Your choice of an archetype is this line of work. While excelling at this choice, rogues are good at a variety of tasks and, therefore, not limited to a specific job or role because of it.

Transporter

You have developed an extraordinary ability to move people and goods from one place to another. Maybe you are a driver for a thief's guild, a smuggler of contraband, or someone who helps others sneak out of prison.

Driver

When you choose this archetype at 3rd level, your knowledge of vehicles and mounts begins to shine. You gain proficiency with vehicles and in animal handling. At 6th level, when the rogue feature Expertise allows you to pick two more skills for which to be doubly proficient, you automatically gain expertise in vehicles as well.

Using vehicles and mounts in your line of work has taught you how to push them to their limits. When driving a vehicle or mount, the speed you are able to travel increases by 10 feet.

Stealthy Leader

Starting at 3rd level, your ability to move people undetected improves. By spending one minute explaining how to be more stealthy, one person travelling with you can add your proficiency bonus to any stealth checks they make. The number of people you can help be stealthy increases by one at 7th, 10th, and 15th level.

Drive-by

Transporters have to protect whatever they're transporting. Starting at 9th level, you're now so comfortable driving that you have advantage on your first attack on your turn while driving a vehicle or mount.

Helping Hand

Transporters often have to help others squeeze through tight spaces, jump from building to building, or escape traps while in transit. Starting at 13th level, you can give advantage on dexterity saving throws to people you're traveling with if the saving throw is due to terrain, traps, or other non-combat causes.

Positioning Pro

You become become so good at positioning while driving that you make it easier for allies to hit their mark. At 17th level, when you reposition (move) a vehicle or mount on your turn, allies on it get advantage on their next attack.

Eberron

There is a Passage Dragonmark in Eberron (here's the Unearthed Arcana). It lends itself quite well, flavor-wise, to Transporters. If playing in that campaign, or your DM allows it otherwise, consider taking the Dragonmark feat and choosing Passage as the mark.