City Commuters : Fastest way to go anywhere is to move slowly (Facts)

I have a daily commute of 1-1.5 hrs in city traffic. I have noticed one thing , either I drive at 40kmph or 60kmph I reach office at the same time. The reason behinde this is traffic jams and signals. My commute route consist of highways, city roads, narrow gullys, unconstructed roads so I have seen them all. Even on highways if I speed I have to slow down due to traffic, idiot heavy vehicls , pedestrian, squid scooters. And you can never curise at any constant speed of 60kmph in city. The diffrence between 40kmph and 60 kmph is barely 3 min . Don't risk your life for this. Moreover aggressive driving in city leads to drop in mileage so it's also heavy on your wallet. Moral : Cap your speed limit at 40-45kmph in city in any condition. [Open for suggestions and critisism]