3D.12 Finishes
Comments about this discussion:
Started
The current section 3D.12 concerns timing only. From the discussions we had in the WR committee, it seems that the use of the photofinish mentioned in this section is not necessary for the validation of a WR rounded up to the next second. The photofinish may be important for the classification of a race, especially at UNICON, but it should not be mandatory. I would be more of the opinion that if 2 competitors are less than 0.1 seconds apart and there is no photofinish, the competitors should be ranked equally.
Another important element seems to me to be the introduction of safety rules to define the finish area of a confrontation race (where there may be a sprint: wave start and mass start). I suggest adding that the finish should not be downhill, and that turns should be avoided in the last few hundred meters.
Downhill finishes more often result in falls (the finish of the UNICON20 marathon was on a downhill false flat and resulted in several falls, 1 of which was quite serious). As far as bends are concerned, there is often 1 bend close to the finish line, and when this is the case, the order of finish is usually decided before this bend.
Comment
I agree with you that a photofinish should not be mandatory - especially as it has rarely or never been used in practice.
I also think the other aspects mentioned are important. Definitely a good discussion.
We should also consider whether it would make sense to merge sections 3B.5.8 Finishes and 3D.12 Finishes to have everything in one place and not fragment the rules too much.
Comment
0.1 sec apart is equal to 111cm with 40km/h speed.
Acurracy of time measurement with passive chips is 0.1 sec, and with active chips 0.003 sec.
0.1 sec would not be a good separation for ranking. Riders could draft all the way and just get little closer to be ranked the same position.
Having few riders ranked equally may pose also a problem with awards.
I would keep fotofinish required at Unicon.
For the ease of judging I may consider fotofonish only for awarded competitors.
Fotofinish accuracy should be specified. 120 fps is not difficult to reach with amateur cameras and some smartphones, and with 40km/h gives 9 cm resolution.
Regarding the design of the finish area, I would include it in the rule for the design and safety of the racing course.
Comment
I'm convinced that the photofinish is useful for UNICON, but for other competitions, if there's no photofinish, I don't understand what you're proposing. Are you suggesting filming the finish with a smartphone?
Active chips are very accurate, but if the transponder is attached to the ankle or shoe, there can be a 30cm difference depending on the position of the feet on the finish line. In this case, the accuracy is more like 0.03 sec than 0.003 sec.
I find it hard to imagine competitors sabotaging the race by deliberately finishing within the same tenth of a second. It's not something that happens often. We could also say that if the gap is less than 0.1 seconds and there is no photo finish, the decision rests with a finish judge. And if he is unable to break the tie, then it's a tie...
Comment
Since we requiere photo finish, we should require minimum requirements for the camera. It is useless to have photo finish with 30 fps.
Human eye can perceive the image with 30-60 fps.
Suggested by me, 120 fps at least doubles the ability of human eye and is not difficult to reach without professional photo finish cameras (3000-20000 fps). Means, it is easy and cheap for the organizer.
I agree that neither active chips are good solution, because the rule states the front of the wheel crossing the finish line.
Photo finish must be required at Unicons and at least visual judging on other events.
Yes, if the judge cannot break the tie, its the tie. I imagine it being very unlikely.
3D.16 Accuracy of results already covers situations with ties, with or without foto finish.
Comment
I think that yes, a video of the finish line is a very appropriate way to determine finish order without professional photo finish. It would have to be set up in line with the finish to clearly capture the tire breaking the plane. I don't think issuing ties as official results make sense, and participants will not be satisfied with a tie being issued because we don't want to try to be accurate at the finish line. In practice we have had line judges to make the call and video for review of difficult calls.
I wouldn't say that human eyes "resolve" at any sort of reasonable framerate, their performance in tracking moving objects is much higher than a framerate measure would suggest simply because they work differently. I think a tie could be awarded if it truly cannot be resolved otherwise, but should be avoided when it is practical to capture video of the top finishers and review results for accuracy.
Comment
I'm no expert on photofinish devices. We discussed this subject in the WR committee and concluded that it was necessary for the classification of road races at UNICON.
But there are local or national races where there is no photofinish, and I don't think it's necessary to impose the use of a photofinish or video device for all races (potential IUF endorsed event?).
For example, at the last French nationals, the timekeeper was on the start line to validate the start times of the different waves, but he couldn't be at the finish to monitor a photofinish device. A 2nd timekeeper would have had to be paid, and it would have cost around twice as much to use a photofinish system.
I think the rulebook should provide tiebreaker solutions or not in the absence of a video system.
Official race and WR times are rounded up to the nearest second, so the use of a photofinish or other video device is only useful for tie-breaking.
> Regarding the design of the finish area, I would include it in the rule for the design and safety of the racing course.
It can be integrated into this other section, but in that case it must be made clear that these elements only concern races with waves start or mass start. For a race with an individual start or for a Criterium, these elements do not apply.
Comment
I think it is important that we differentiate in this discussion whether a photofinish system should be mandatory or simply a video recording of the finish. A photofinish system is not a normal video system!
Especially considering the inaccuracy of distance measurement in road races, I see no need for a photofinish system in a road race, its purpose would only be tie-breaking, as Simon has already written. Such a system is of course perfect for this - but in practice I don't think it's necessary for the vast majority of races.
If we want to prescribe a tie-breaking system in the rules, then this should be made clear that it is a tie-breaking system only and, in my opinion, we should definitely list alternatives to a photofinish system.
Comment
So i think in principle we need to have some form of video at the finish line. There are many parts of the course that may be out of our control as far as having resources to review, but a video of the finish to be retained until the protest period has ended seems the least we ought to do for anything that is IUF sanctioned.
A photo finish system at Unicon where the world champion title is on the line doesn’t seem overly onerous to me either but there is a clear increase in cost present there.
Comment
I think we should perhaps first answer the question of exactly what purpose we want to prescribe a photofinish system for?
As I said, I personally only see the purpose as a tie-breaker and I wonder whether such a system is really necessary. How much effort is it really worth to break a tie? At what point are two performances even worthy of differentiation (for example, one could take into account slightly different starting positions, a slightly different route resulting in different distances covered, external influences, etc.)?
If we look at other sports, e.g. athletics, where there are also fixed distance races in the form of road races, in which world records are also recognized and which, in my view, are very similar to our fixed distance races, then there is no need for a photofinish system there, for example.
Comment
Hmm, I see breaking a tie in exactly the opposite way. The only truly comparable performance between two athletes is their performance on a given day across the same course. The conditions are as similar as possible for everyone, and so a win or loss comes down to fitness and racecraft. Maybe top athletes see it differently, but I’d personally be very disappointed if an effort wasn’t made to say who finished ahead if I were involved in a very close finish for a podium. That’s the very nature of shoulder-to-shoulder confrontational races.
Comment
> The only truly comparable performance between two athletes is their performance on a given day across the same course.
I would agree with this in principle - however, I personally believe that this is not feasible up to any accuracy. For example, if someone would start two meters behind me at the start, but I would only be 1/1000 second ahead of this athlete at the finish, then the tie breaking would have a very unpleasant flavor for me. I would definitely prefer to be scored equally in this case, because I don't believe that the performances in this case can really be differentiated with such a high degree of accuracy.
But I can also understand if there are people who prefer to separate the rankings within a race with the highest possible accuracy. In this case, of course, a correspondingly high-resolution tie-breaking system is required.