SANDAG is committed to serving those with disabilities and particular needs. The 511 phone service and websites were reviewed by accessibility consultants and an advisory committee. Both services were enhanced following professional recommendations. To access 511 hearing impaired services, call 711, the national three-digit number for access to Telecommunication Relay Services (TRS)
. 511 also features a touch-tone function. Callers can choose to use a phone keypad or voice commands for each menu option.