Sounds like that's another difference between WA and Vic scatter events - including busy roads on the map. Here in WA we try only to have them as a boundary (it doesn't always work out that way) but for my next event (Claisebrook/East Perth) there is a somewhat busy road straight down the middle of the map. There is an underpass but I don't like to force people to have to choose a particular route. Ian F set an event earlier in the season where he marked three 'main roads' out of bounds with just the one crossing for each but considering there wasn't any traffic on any of them, it was done more to alter route choice than any other reason.
Stirling Hwy on our last weekend's event was marked uncrossable for safety reasons (there was an underpass) but anyone who got the three CPs on the other side had set a terrible course anyway.
I've been debating whether to do the same for my event or to just tell people to be careful (it has a VERY wide median strip so no need to cross it all in one go) but I'm sure I'll get comments on having to wait for traffic thus causing a loss of a position or two...
Needless to say I have marked Graham Farmer Fwy out of bounds!
I am a bit surprised that the Eltham Lower map did not have the busy Main Rd and Fitzsimmons Lane marked as OOB. People crossing here and there between speeding cars is not a good look for an organised sport such as street orienteering and I doubt it would pass the risk management test required of other sports. They should have marked the acceptable crossing spots i.e. traffic lights and the Fitzsimmons Lane bridge underpass.
I'm sure tte last Street-O we did here main road was out of bounds.
I doubt it would pass the risk management test required of other sports
cough urban rogaining cough
Strangely, a section of Main Road for a few hundred metres east of the roundabout was OOB, but the roads west and south of the roundabout, which I would have considered more dangerous, weren't.
Despite its name, Main Road is a two-lane road for most of its length, but it carries a fair bit of traffic and has few traffic lights, so you don't get gaps in the traffic either.
*cough* Jetty Rd, Glenelg, during street O tonight *cough*
But at least all the traffic was moving pretty slowly as everyone was looking for a park near the beach...
Many years ago, before Swanston St was modified, we did some training exercises at the top end of Melbourne which took in a lot of the busy streets where it wasn't just the cars but also the trams. Highlight was running through an old W-class tram that was stopped at the lights. In the left side and out the right, much to the surprise of the conductor.
In the Marcialonga x-country ski race in Italy, there was a very crowded start for around 2000 people in a small village. One household on a corner had kindly laid carpet down their hallway for the occasion, and people were skiing in the front door and out the back door.