Basics

Numerous Systems (and Government Policies) aimed at reducing Internal Combustion Engine Vehicles Spent Running on Idle

Methods

Auxiliary Power Units (Can be more efficient Generators than the main engine) (Similar concept but for heating coolant supposedly?)
Cold Ironing (For ships. This is also typically used in the context of Container Ships , but it can apply to smaller ones as well!)
Truck Stop Electrification
- Parking Lot Electrification ?
Idle management/control