Why does it need more motos? Professional races already have several commissaires, riding pillion, close enough to the riders to be able to point a detector at them and view the thermal image on a handheld screen - they could easily do this job. The Stade 2 footage demonstrates that the detector doesn't have to be really close to the riders in order to discern enough to place a rider under suspicion. I dare say portable detectors with large enough screens to make sense of while on the back of a motorbike can be procured - modern technology is pretty damn capable - likewise ones with detection ranges optimised for the temperatures encountered on bikes in races. Maybe they'd need some customised panniers to store them in during less important phases of the race. I doubt if anything is insurmountable.
Once detected, a suspicious bike could be radioed to the chief commissaire and race director, who could take measures to impound the bike immediately at the finish.
Or if necessary they could enforce a bike or wheel change there and then and get the bike/wheel picked up by a following official mechanic in a van for an immediate roadside inspection and/or secure conveyance to the finish.
Once the UCI has investigated and calibrated the detection system possibilities thoroughly, including testing real-world bike/motor/riding situations with affordable portable and suitably reliable/sensitive detectors, it will likely have a pretty decent understanding of the typical thermal image signatures for hidden bike motors and the degree of certainty of an incongruous heat source having doubtful provenance - meaning enforced bike/wheel changes would not necessarily be unreasonable in a race context. But clearly discretion would need to be exercised if the suspected discovery occurred at a critical point in the race - in which case the rider(s) could be allowed to proceed but carefully scrutinised to ensure no secret bike-switching takes place before being impounded. And if a motor is discovered in a roadside inspection following an enforced change during a race, then the entire team is immediately disqualified and instructed to withdraw from the race.
Obviously a lot needs to be thought through by the UCI, and no doubt those who are so naïve as to think this cheating hasn't happened, or who object to the effort made to uncover it, will throw up 'obstacles' or find reasons to complain, but the UCI has to do something to maintain racing's credibility in light of van den Driessche and all the compelling circumstantial evidence. Laugh all you want, but a practical impossibility it almost certainly isn't - Greg Lemond thinks it's a good idea, and his opinions on such matters carry weight.
