Parking data can provide reliable and timely information for transportation planning needs, and there are various sources to draw from. Parking meters collect payment for parking spaces, recording occupancy, duration, and payment data. They can be coin-operated, card-operated, or app-operated, and communicate with a central system or mobile device. Parking sensors detect the presence of vehicles in parking spaces and transmit occupancy and duration data. They can be embedded in pavement, mounted on poles, or attached to vehicles using magnetic, infrared, or ultrasonic technologies. Parking cameras capture images of vehicles in parking spaces and process occupancy, duration, and violation data. They can be fixed or mobile and use license plate recognition, video analytics, or artificial intelligence techniques. Finally, parking surveys collect parking data by observing, counting, or interviewing parkers in parking facilities. These can be manual or automated and use paper forms, handheld devices, or online platforms as tools.