I'm not an expert, but to me it seems to be caused from how they implemented UE4's autoexposure/eye adaptation.
You can see this effect in action when switching from an exterior bonnet view to the dashcam / cockpit - once behind the glass the road ahead is briefly dimmer and how it probably should look, but then quickly ramps up to being overly bright.
Disabling the auto-exposure in the engine.ini on PC straight up breaks everything, though. All you get a bright white screen if you disable that setting, even in the garage / menu scenes.
It's mainly an effect that makes sense in third / first person games (which Unreal is primarily designed for). Like when you're inside a darkened building and your "eyes" have adapted to the darker setting, then you look outside a window or door and it seems way brighter and blown out out there, and when you approach traverse the door its even brighter but then calms down once you're actually out in the light and your eyes have a adapted again, but this time to the sunlight. The problem is, the inside of a car should not be doing this sort of thing at all with all the windows letting light in, it's not like a darkened interior of a building, but it's still acting like one with how things are being rendered with the current autoexposure & eye adaptation settings they having going on.
They really should remove this effect entirely. It's absolutely pointless for a game like this. The only thing that maybe... maybe should have anything like this, is a long dark tunnel on a stage itself. Not the car interiors. Definitely not the cars!
Yes and for me the modification of engine.ini have no effect
Please ea delete this effect
Temp workaround (*but definitely not a good one) is to reduce the sun's intensity in the bottom of your Engine.ini under [SystemSettings]
[SystemSettings]
r.SkylightIntensityMultiplier=0.5
You can do any amount you prefer.
*I say it's not good because it only works on PC, and it darkens the lighting from the sun in every stage and every time of day. So objects on the side of the road, and sections of the road shadowed by trees or whatever will also be much darker. You'll have to remove or adjust this for each individual location and lighting condition. And it does not resolve the core issue of the unnecessary autoexposure/eye adaptation being enabled while inside the cockpit. That's still happening, so exterior views will also be even darker.
Anyway, this is what it does to daytime in Mexico.
default: 
r.SkylightIntensityMultiplier=0.4:
It makes things even more unnatural the other way with the harsher shadowing and dimming, but for some it may work a bit better for road visibility in certain stages and conditions than just reducing the game's brightness on the whole (these were SDR w/ brightness at the default 50) until they figure out a way to ditch the exposure junk.
Here's a quick video showing off the auto-exposure in action when switching to an interior view:
https://www.youtube.com/watch?v=oXThJnEc3eQ
Most other settings that effect the visibility are turned off or disabled there, unfortunately this craziness cannot be disabled on our end from what I can tell.
sa1vequick posted a better workaround on the steam forums.
just need to add and adjust this r.EyeAdaptation.LensAttenuation=0.45 setting in the under [SystemSettings] in the Engine.ini
they recommend 0.45, but you can try any value you want. ymmv, and once again, this isn't a true solution,just a hackaround. the overall effect still needs to be removed for real so console players can benefit as well!
