In One-Punch Man, a Saitama in training saves Tareo and his pet from a car that was very close to run over them. I'll be calculating his speed.
First we need to calculate the distance between Saitama and Tareo, because that is the distance that Saitama ran to save him.
Saitama = 175 cm or 1.75 m
Panel Height = 5.99 m
Distance = 1.75*5.99/[1.75*2tan(70/2)] = 4.27 m
After that we need to measure the length Tareo's head.
Garou = 177 cm
Tareo's Head = 21.59 cm
Then, I need to measure the distance between Tareo and the car.
License plate = 140 mm or 0.14 m
Panel Height = 1.45 m
Distance = 0.14*1.45/[0.14*2tan(70/2)] = 1.04 m
That's the distance between the license plate and the field of view, now we have to find the distance between Tareo and the field of view.
Tareo's Head = 21.59 cm or 0.2159 m
Panel Height = 1.27 m
Distance = 0.2159*1.27/[0.2159*2tan(70/2)] = 0.91 m
Now to obtain the distance between the car and Tareo, we should subtract the two previously calculated distances.
Distance = 1.04 - 0.91 = 0.13 m
With that distance we can find the timeframe. The general speed limit in japan is 60 km/h or 16.6667 m/s, so I'm going to assume the car was moving at that speed.
Timeframe = 0.13/16.6667 = 0.0077999844000312 seconds
Finally we can find Saitama's speed.
Speed = 4.27/0.0077999844000312 = 547.44 m/s
Saitama's Speed = 547.44 m/s, Mach 1.60 (Supersonic)