Make them pay!!!
They want us in there on Saturday then make them regret it. Do your job by the books.....no shortcuts....only park on the curb....only walk the designated walk path....only cross behind the truck....three points of contact....face bulkhead door....drive the speed limit....use existing tools....everything to the letter of the law. Then when you reach your 70.... pull over and call for them to pick you up.
Should be done every day like that, would simply be forced to add many more routes all across the land.
Here's a perfect example of how I work regardless if you all think it's dumb or petty.
Yesterday I had deliveries for 2 apartments on my route where there is multiple buildings side by side in a row to give an idea. And the buildings have a somewhat long walk, lets say perhaps 100' and they are separated from their sidewalks by maybe 10' of grass.
I only had one small package for each. Now instead of just cutting across the lawn which you shouldn't be doing in the first place, I walked the sidewalk all the way back up.....turned to my left......and walked all the way back down.
Perfectly legit delivery method using the designated safe paths.
Now, implement this and other safe means all day long and let me know how it goes for you.
Then a lot of you doubters will no longer be wondering how a guy can consistently run 3+ hours over all year long.