N -- I think you're spot on. A teammate of mine emailed the promoter last year making essentially the same argument and urged him at least to include the wall each lap in the 3/4 fields in the hope of making the race a bit more selective, obviously to no avail.
yea i realized that the organizer can't do it logistically after questioning why the wall isn't included ever lap.
there is essentially only one entry and exit for the 5-6 people living on that street. So with rolling closures and no yellow rules line, in order to do gamber wall, those people living their would have to be ok with no being able to leave their house (or come back to their house) for the entire day essentially. I wondered too, why the number of times seems to vary every year , and the above explanation makes sense.
i really dont know how to change that race or course other than removing the 1k sign honestly. Most other races in my area dont have the 1k sign. They start signing maybe* at 250m to go. i swear when racers at turkey hill see 1k to go, sprinting starts... again that's my assumption though.
edit: to add to what karsten just posted
- only 1 road is yellow lane ruled. There wasn't a bottle neck here to be honest. Seemed mellow/non factor to the racing or the 'danger' on the day. my observation this year and last.
- yea i see people put on their 'brakes' after the rollers, trying to recover. So there is a definate slow down until the final 1.5km when things decide to ramp up downhill.
all domino effects really. I personally think inexperienced racers (and probably me when i started racing to be fair) have a lack of respect for themselves and others in races. Racers are willing to do anything to win and put them and their bikes in places they shouldn't be. At that point they are probably ok with endangering themselves, but do not realize the impact that it might have on every single wheel behind them.