If you're stopped at a light?
If I were stopped at a light and there were someone posing a grave threat, my Harley would be sailing through the light.
If I were trapped, which I plan ahead for (not to be trapped...car or bike)...my Glock is IWB at about 5:00...not a problem.
I don't have lots of gear..just a Florida leather jacket on those cold mornings...55'...Brrrrrrrrrrrrrr!
My G-36 is just one zip away...actually I could get it without unzipping the jacket.
I also keep a 4oz OC spray right on my dash for dogs who like to chase bikes...I guess that might also help with a threat.
Stay armed...stay safe!