Roane County, Tennessee, USA 19.3.1

That's not a bug with my map, it's the game engine. The water rendering gets much less accurate as you get further away. This also happens in some other games, too.
NO cars are supposed to keep floating, unless it's a boat, or something similar. The older version of the map had somewhat-more-dense water settings than should have been. However, this being said, the car will hydroplane over the water a bit if you're going fast enough. The vehicle sinks when you lose enough momentum.

Lower the REFLECTION RESOLUTION (for your car's mirrors) to something less than half, this should considerably increase your FPS. I have an Rx 480 8gb here and yes there's a few spots that get a bit of an FPS drop. I never noticed the FPS drops when I have the Radeon 7850 2gb, but it was much more noticeable with the newer card. As the game gets updates and the map does too, expect things to get better, not worse (with the exception of very select places like downtown Rockwood that's not finished yet, fps may drop a bit there with all the buildings when it's completed). Turning off anti-aliasing might help FPS but not as much as the 1st thing I mentioned with mirror reflection resolution. Other users have reported turning off shadows helps (or turning them down) but I feel that's a bit drastic for a 980 video board. Overall I am glad you enjoyed it and look forward to the next update that should be out in December sometime. The map update will trail the game version update by a week or two.

Special attention was paid to the AI working properly on this map, hours and hours and hours to be factual. It's possible it was DAYS of time but it's never too much to ask for the fun car-chases that result. While I can't keep the AI from driving the wrong way, it DOES work fine and follow the road perfectly 99.8% of the time. If you find any issues with it where it consistently gets stuck or drives off the road give a shout in the discussion forum, with a screenshot or two I can have a look-see at it.
--Thanks for writing in & Glad you like it.

I had a Radeon 7850 2gb that got a steady 24~52 fps before I bought an Rx 480 last month, consider upgrading the card in the near future as other new games have higher requirements.
Also, consider playing full screen with the Vsync off.
Use low detail if possible. Turn shadows off possibly, and also, turn off reflections, that card is not powerful enough and they hit hard on a map this size. SSAO and AA should be turned down to minimum or off.
I hope this helps. A full detail game-world like this tends to really show off what this game can do / can be but can really hurt performance on lower-end mainstream video cards. That having been said, the rest of your PC is great for this game and you should have great performance otherwise especially if you have an SSD.
--Thanks for writing in, performance shouldn't get any worse in the future with updates, it should only get better.

That's close to my specs (different video board though), you should get pretty good performance with that once it's all loaded into memory.
The vibrating car/physics jittering is merely visual, it doesn't affect the crash physics at all. This is a large-map issue with the game engine (this is a pre-release game, too), once you get 5~10+ miles of the center of the game-world. You won't notice it when you're going fast, though.
--Thanks for writing in.

Shaking cam/car is VISUAL ONLY and does not affect physics. It happens when you get 6~10 miles from the world center of 0,0,0 in ANY Torque3d engine game with physics (Beamng.drive is made from Torque3d). This is a known issue on my end (it's the game engine, not my map).
Your GTX 960 is memory-bandwidth restricted, consider looking at your graphics options and turning down mirror (reflection) resolution, faces per update, detail distance, or lastly, setting texture detail to medium.
This is a very high-texture-detail map. It does most certainly use up 3550mb of that 4096mb of texture memory you have!
This is a cutting-edge map (beta) on a cutting edge (pre-release) game, it may not run perfectly - this is known, but there are some tricks, like turning off Vsync in fullscreen mode, turning down anti-aliasing, SSAO or HDR settings (or turning them off if it's all that's allowed).
Watch your fps (enable it in Steam overlay!) and mess about with options a bit. Some FPS drop is normal in very 'busy' areas like Harriman downtown (you can spawn there, do so to adjust FPS).
-Thanks for writing in and enjoy the map!

Thanks. More vegetation will be added in later versions as I go around and finish-off areas and get the last of the resources scripted up to use. The lag you get may be exacerbated by using full-detail reflection resolution in your mirrors. I have an 8gb Rx 480 I just got last month, and it'll perform worse than my old 2gb Radeon 7850 HD card (oc'ed) if I have the reflections cranked up (vs the 7850 with no reflections). Turn the reflection resolution down to minimum if you can, but do keep it enabled. This map is made to use all the hardware on a top-end gaming computer, but still run with something half as fast, at an acceptable pace. As time goes on and more things get done, expect fps to stay just a bit more steady. Roadwidth is done by eye, so it should be pretty accurate (picture of car infront on said road IRL vs in-game shot side-by-side comparison). Most roadways are 8'~9' (back roads) wide to 11' wide or so (major signed routes & highway) PER LANE, center turn lanes, etc may be just a touch wider @ some spots but not too often. Basically you should be able to drive a truck anywhere but in a downtown with lots of room (the T-series truck JUST fits in downtown Harriman's lanes - JUST).
Often I looked up the national highway and roadway DOT standards to get an idea how to work things (curves, banking, signs, bridges, light placement) when I wasn't using google maps. Lots of reading!
Enjoy, and the future holds much improvement for this map - thanks for your honest review and feedback! --Cheers!

If you use the 'start a conversation' feature and tell me where some of the locations are (obviously if this is personal, that's perfectly OK with me!), I can see to putting some of them in with decent realism with the models and resources I have available. More roads will be added in the future, too. Thanks for the honest review and glad you enjoyed this.

Wow, that's a shocker. I bet you have virtual memory ENABLED (as it should be). The low texture settings most likely are helping you a lot too. So long as you have the 5gb free to load it, it should run, though choppy at times, at 720p. I had one of those about 4 years ago for a few months, with 1gb ddr3 they're not too bad if you keep the detail and resolution turned down and have realistic expectations.
If it doesn't crash your game (in a windowed mode) to open the editor, click LIGHTING on the menubar, choose BASIC LIGHTING, and wait a moment while it re-computes some resources, then exit out of the editor, that may help if the FPS suffers a bit.
While I don't officially support 6gb systems (though the game does), I am glad to hear you can run it, Do enjoy, and restart Beamng,drive if it slows down after a while.
Thanks for taking the time to write in - it will help others! --Cheers!

Thank-you - this was my way of thanking the developers especially, the community too, and showing that "yes, a large map can be made, and can be fun, and detailed, in Beamng.drive". The small maps this game comes with are beautiful but just didn't do it justice size-wise against some of the other games out there. I could have made it a bit bigger yet but I would have not been able to keep it running for the folks with 8gb of RAM and that's a large percentage of the demographic here. --Cheers!

Send me a user-to-user (private) message detailing what you need. The textures (95% of them - including all the road textures) are mine but some of the models are from other users. If you cannot be sure via the credits, please send me a message or ask in the 'discussion' forums. Take pictures of the specific house or sign models (for example) in question, if need be, to help out.