They say about 8,000 motorists have been caught, but look at the sample size. From October 2013 to now is 22 months of data. If the Express & Star wait until 2025 the headline would be, 'Millions of M6 drivers hit by...'.
Besides, proof is in the pudding. If everyone was getting fined then I'd say there was an issue with signage, but since only 15 of the 120,000 vehicles travelling that stretch are getting fined, on average, the significance of this article is ridiculous. It works out that approximately 0.0125% of motorists using that stretch are likely to get caught speeding. Hardly worth the space in the newspaper isn't it?
Statistics are often used against us. It is like the advert from Money Advise Service that tell us that 1 in 5 people wished they'd never bought their own home, to frighten us, but translate that the other way around, and four out of five people are glad they bought their own home.
Never trust facts and figures because they can be made to look however they want them to look.