As I initially suspected (
here), the extension he proposed is within Marina East, but I wasn't expecting it to be so close to the barrage bridge.
I mapped out his proposal as follows:
I only draw out the 1-way distance to see how far one must go to hit 550m, as u-turning to take the exact route out of this deviation would allow you to clock the extra 1.1km.
This proposed deviation occurs approximately at the 13.5km mark of the race route (
see exact deviation here).
If google maps is to be trusted, you don't need to hit the actual road to have clocked the 550m. In fact, if you reach the road (Marina E Dr), you might have done closed to 580m.
Now here are a few challenges:
- Organiser should have closed off any outlets along the route which may confuse runners.
- Closure might be a simple un-manned cordon, or manned with staff/volunteers.
- If it is manned, there's no way to do this extension, as you would be stopped or even taken out from race, depending on the powers granted to such race marshals (volunteers/staff?)
- You may disrupt the race by confusing the other runners in your proximity.
Deviate at your own risk!