I have a general question on how to bike faster or reach a destination faster while urban riding. I am riding a hybrid marin bike with a rack and usually have a pannier that is full (18L). My destination is 14km one way or 8.669 miles and it takes me around 46 minutes and I average at most 11 mph but can never get more than 12mph. I feel like I can do better but my routes are a mix of dedicated bikes and painted lanes. The maximum elevation gain is usually 269ft. Is there anything I can do as I try to not carry a lot of weight