How fast do helicopters fly?

Hello,

I was watching the news earlier when a 'late breaking story' came on. Apparently someone was airlifted from an area that is 1.5 hrs driving distance from me. I expected to see a helicopter around 7ish (I can see the only hospital helipad from my window), and the helicopter just landed now. Why in the world would they airlift someone, and take nearly 3 hours to travel when an ambulance at highway speeds could get them there faster?

Please help

I didn't find the right solution from the internet.

References:
arstechnica.com/civis/viewtopic.php?f=23&t=114582
Digital video content production studio

Thank you