Free travel pass

A free travel pass is when certain passengers can use buses, trains or trams without paying a fare or showing a ticket. They may need to show an identification card produced by their employer, or by the transport provider.

Types of passengers
Types of passenger who may receive free travel on transport services:
Students
The elderly
The disabled
Children under 20 years old
System employees and their dependents
Public safety workers and military personnel

List of examples
Australia
Canberra, Australia - Free public transport for everyone 75 years and over.
Victoria, Australia - The Myki Access Travel Pass is a free Travel Pass for people with a significant permanent disability who travel independently on Victoria's public transport network. 
Canada
Kingston, Ontario - all children 14 and under (no pass required), all high school students attending a high school in the City of Kingston (pass required), all recipients of Ontario Works benefits (pass required), companions assisting a person with a disability (application and pass required) 

Taiwan
 Taichung
 The city offered free bus travel for trips under 10 km by paying with an electronic card, and fare cap of NT$10 for longer journeys. However, since ROC 110 (2021), the concession is only available with a named resident-only card, making free travel only available to local residents, and the basic fare has become NT$15 (NT$5 discount from cash fare NT$20) by paying with a non-resident card.  
United Kingdom
England
In Manchester, The Oxford Road Link (Bus route 147) offers free travel for part of the route (between Manchester University and MMU campuses) for university students and staff. Three free bus routes also operate in Manchester city Centre.
England-wide travel provided by the DfT for over-60s and eligible disabled people between 09:30-23:00 weekdays and all day weekends under the English National Concessionary Bus Travel Scheme. Similar schemes operate in Scotland (see below) and Wales; however there is no unified scheme covering the whole of Great Britain and national concessionary passes are valid for use only by citizens of each of the three countries and only within each country.
Scotland
The Scottish National Entitlement Card offers free bus and scheduled coach travel throughout Scotland for disabled and elderly passengers.
Republic of Ireland
Free travel for all persons over the age of 66. Many people with disabilities and their carers are also eligible for free travel passes. Free travel can also be extended to Northern Ireland (part of the United Kingdom) with a separate document, the Senior Smart Pass. In total, nearly 1 million people (out of a population of 5 million) have free travel.
United States
Lancaster, California - passengers of Antelope Valley Transit Authority who are disabled, senior citizens,  active military,  and veterans,  all ride free on all local fixed route buses (with id)
San Diego, California - employees of the Metropolitan Transit System ride free on all scheduled routes (with ID).
 Washington, D.C. - The Washington Metropolitan Area Transit Authority (WMATA) has a service for the disabled and persons unable to use public transit, called MetroAccess, which allows Metro Access card holders to use Metrobus and Metrorail trains without paying. This is also available for services provided by WMATA in Maryland and Virginia. 
 Montgomery and Prince George's County, Maryland - In addition to WMATA mentioned above, Ride On in Montgomery, and TheBus in Prince George's offer free bus trips for elderly and disabled passengers (including disabled who do not have Metro Access cards.)  
Zagreb, Croatia - Free public transport for all students, unemployed persons, disabled persons (more than 70%), blood donors and everyone over 75 years
Other major cities of former Yugoslavia (Belgrade, Niš, Osijek, Split, etc.) - free use of buses and trams for everybody over 80 (in some cities 100) years
American Airlines used to sell lifetime passes for unlimited first class tickets on all of its flights under the brand AAirpass. The offer was discontinued after it had been found to cause substantial losses to the company.

 References 

Category:Public transport