Now that TSW is out, here is the complete list of achievements: Stuff that I never noticed before release is the stuff marked in
NEWTravelling:
Centurion: Travelled 100 miles in
any locomotive

Mega Train: Travelled 1,000 miles in any locomotive

Unstoppable: Travelled 10,000(!!!) miles in any locomotive

Trailblazer: Travelled 1 mile on foot

Pilgrimage: Travelled 100 miles on foot

Exodus: Travelled 1,000 miles on foot
Using things:
Switcher: Changed a track switch

Switch it Up: Changed 500 track switches
NEW
Making Connections: Coupled to your first train wagon (this one uses the wagon terminology for some reason)

Powerhaul Prep: Coupled to 1,000 cars
NEW
Miner Achievement (putting achievement into the achievement name seems redundant): Loaded a coal car

Carbon Overload: Loaded 1,000,000 tons of coal (or a bit more than 8000 bethgon cars....yeah...)
NEW
Hinge Breaker: Used 1,000 doors (I bet you don't need to go to then use 1000
unique doors, however)

Ventilator: Used 1,000 windows
General Progression:
Rookie: Completed the Introduction

Qualified Engineer: Completed all tutorials on Sand Patch Grade
NEW
Railfan: Took a screenshot

If you build it...: Built a consist of 100 cars

Connoisseur: Collect all collectables on a route (note that it says A route, not specifically Sand Patch)
NEW
Going the Distance: Completed a full service

Workaholic: Completed 100 full services on any route
NEW
Mission Possible: Completed all services on a timetable in Sand Patch Grade (this is one of the only Sand Patch specific ones)
NEW
Super Sand Patch Grade: Completed all scenarios on Sand Patch Grade
NEWSecrets: (picture and name, but no description)
Wheelhouse Master: Performed a 360 degree turn on the turntable (I can see why this is a secret one; nobody is going to bother to do a full 360 turn in normal operations)
NEW
Casey Jones: Attained Driver Level 20 (an underwhelming secret for sure)
NEWCompared to TS17, these achievements are much more generic, none of them specifically says "use the AC4400CW for this" or "complete this scenario perfectly." In fact, these could all apply to a route other than Sand Patch (the coal loader is the only route specific achievement, and coal isn't exclusive to Sand Patch anyway.) At the same time, these are also many more long term achievements. In TS17, if you played all the scenarios in a pack and lost no points, then did some quick drive, you would probably get all of or most of the achievements. I don't see driving 10,000 miles happening very quickly at all. That one is certainly a mark of someone who has spent a ton of time in TSW, which, weather laughable or respectable, is impressive.
Some of these achievements are basic as usual, but some of these are actually worthwhile and difficult, while also not being distracting to the gameplay attitude.