The United Kingdom (UK) has:

• London: With low emission zone, zero emission zones, congestion charges, and a number of access regulations for heavy duty vehicles.
• Low Emission Zones (known as Clean Air Zones) in several cities. These have a national LEZ framework, but can affect different vehicle types. Stickers are not needed, registration is required for foreign vehicles. Vehicles can pay to enter if they do not meet the standards.
• Scotland has its own national LEZ framework.
• A number of other cities low emission zones that affect only local buses under agreements.
• There are a number of other urban area road tolling schemes.
• Oxford also has a zero emission zone in place.

There is a single travel planner for the UK, called Traveline. It is provided by public transport and city authorities. There are also regional versions of this travel planner, and many cities also have their own services from their website. For London use TfL's website