That thing is a cement block! I don't know what PD was thinking but there's no way in real life someone can drive into a cement turn sign at 150+ mph and live, lol.
That turn sign nearly cost me the race win during the FGT Championship. I clipped the grass sleightly but I just about regained control, then I hit a tiny sign, thinking that I could plow through it. How wrong I was.
The top gear test track has something similar right before the hammer head (little reflectors or something). When I was doing the the races in special events I found out the hard way with the lotus. I'll check that track out tomorrow and see exactly what you guys are talking about.
Given the size of my TV, I have to drive with a view equal to half cockpit and half windshield. Once driving a left hand drive car I clipped this box of adamantium, and I miraculously survived. My car seems to be made of adamantium as well since it barely got a scratch! .