You can use your car as extra storage space for useful prepping items. One way to do this is by keeping unusual but useful tools and items in your glove compartment like a can of bear spray or a shemagh.
Below is a list of assorted survival items that you may want to keep in your glove compartment for small emergencies while on the road or while bugging out after SHTF. (h/t to TheSurvivalMom.com)
Note that you don't need all the items in the lists below so just choose which ones are useful for your various prepping needs.
A bush knife, which you can use for food prep or self-defense
A can of bear spray
Cheap poncho for rainy days or as a makeshift shelter
Crowbar for prying doors open after SHTF
Emergency tool for breaking windows or cutting seat belts if you get in a car accident
Ferro rod for firestarting
A full-size fire extinguisher
An inflatable kayak may seem unusual, but you may need one if you often pass by a bridge on your commute to work. This item will prove useful in case the bridge goes down because of an earthquake or bridge collapse. You can also add the current year's tidal charts so you'll know the best time to get your get-home bag and head back home.
Two new two-gallon gas cans. If you have to shelter in your vehicle, two small gas cans are easy to carry and a balanced load. Two cans of gas should also be enough fuel to run your vehicle for a while.
A windproof lighter
First aid and medications
Bleeding control trauma kit
BleedStop blood coagulant
A complete trauma kit
An emesis bag/barf bag
IFAK with water purifying tabs
Opioid overdose kit
Food and utensils
Army can opener/P-38 can opener
Canteen with stainless canteen cup
A car kettle for your car, which is a slim device (like a 24 oz. bottle) that fits into a cup holder. You can plug it into the car charger to heat water for ready-to-eat meals, hot chocolate or whatever food and beverage that require hot water.
Cat food, if you're traveling with a pet cat
Dog food, if you're traveling with a pet dog
Juice box and crackers for family members with diabetes
Ketchup packets, which can be combined with hot water to make tomato soup if you run out of food
Napkins and straws
Ice chest with wheels and handle with all kinds of emergency supplies, like food and water along with a first aid kit and maps. An ice chest is great if you need a non-traditional container.
Real silverware, salt and pepper
Seeds and bread crumbs for feeding wild birds at a park
Tic Tacs, especially if you need to freshen up but don't have a toothbrush and toothpaste