Inflation, Investing and Everything
This is an initial speed estimate of the Ferrari that rammed into the taxi at Bugis Junction, Singapore early in the morning of 5th May 2012. The story and video can be viewed here. Other links, opinions and commentary can be found online on Facebook and other social networking sites.
The usual disclaimers apply : I am not an expert in this area. I am filing this under the Tech section while utilizing appropriate technical tools available to try to come to an estimate, and to show how this could be derived based on currently available data.
Speed = distance divided by time, so we need to estimate both the distance travelled and the time taken. Let's start with the time factor. We shall first look at the video recorded by the other taxi that fortunately escaped the collision. The first frame that shows the Ferrari crossing the second line of the pedestrian crossing is as follows :
7 frames later, the Ferrari has crashed into the side of the taxi :
If we examine the meta-data on the video, we note that it is running at 25 frames per second (25fps) :
7 frames divided by 25 frames per second gives us 0.28 seconds. We need to divide further by 60 to get it in minutes, and divide again by 60 to normalize it into the hours unit which is 7.778E-5 hr, which we then note down.
Next, we need to estimate the distance travelled. Whereas a more accurate method would be of course to go down to the scene and carry out measurements on the spot, the next best estimate we might be able to get is from using the measurement tool on Google Maps while setting it to the maximum possible zoom level without going into Street View mode. This is as follows :
We have 14 meters, give or take perhaps a meter or two. Normalizing it into the kilometer unit, we get 0.014km. Hence, the initial estimate of the speed is 0.014 km / 7.778E-5 hour = 180 km/h.
No doubt there could be questions about counting the frames in the video. Each frame is 0.04 seconds long, and let's say the count is off by 1 frame or less (i.e. between 6 and 7 frames). In addition, the line drawn with the measurement tool on Google Maps could be perhaps shorter by a meter or two (give or take). We plug these figures into a spreadsheet and arrive at a matrix of various speed estimates :
As can be seen, the speed estimates range from 154 to 210 km/h, depending on the two variables of frame count and distance travelled. The speed of the Ferrari based on the above estimation is thus 180 km/h +/- 30 km/h.
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