Google should have an image enhancer for this kind of thing. Perhaps it could recognise there is a word in the image and then add better resolution and sharpen that section of the image a little :-)
Not sure what the exact number would be but, if you really think about this a little more then you might discover that the potential number of PIN would be more than 1000. Also not sure how you came to the conclusion that this would be narrowed to 24?
I think that if there was no skid marks prior to the impact at the accident site, this combined with the text might show that the driver was negligent. Just a thought .