For anyone willing to test
Top Gear (do it, if only for the amazing music

), here are how to get to the affected areas the fastest. The game is really easy, so this shouldn't take too long.
At the main menu, select "Country", then "UK" and enter password "HORIZONS" to unlock all countries in easy mode. Pick the white car, uses less gas and goes fast enough.
1st glitchProblem: During night/dark tracks, there's a flickering bright line in the horizon. See video
https://youtu.be/6LpODWYyMGE?t=344To test the 1st glitch, select Germany as your country, then race the 1st track and on the 2nd track, it will go dark around the second lap.
2nd glitchOn tracks with tunnels, there are allegedly glitches outside or inside the tunnel (stop the car and please make a video if possible).
To test the 2nd glitch, select South America, and right at the beginning will be a tunnel. Check if there are glitches outside or inside the tunnel (make a video if possible).
3rd glitchOn some races, track objects such as trees, pegs, roadblocks, are glitched and are where they are not supposed to be.
From what I remember, on the 4th track in USA is where you can see all the pegs and roadblocks glitch out (need video of issue if possible).