Why is it that sometimes I can buy/extend parking and sometimes I can’t?

For on-street parking: Please check the posted municipal signs, which indicate the hours of operation that paid parking is in effect. Payment is required at different hours in a week. If you attempt to buy or extend parking into these prohibited times the transaction will not be permitted. In addition, there are periods when parking is allowed free of charge. If you attempt to start a session during one of these free times, Green P Mobile Pay may allow you to complete your transaction to purchase parking for a future time in the app, so make sure to review the session end time on your confirmation screen before you confirm payment. For non-gated (pay-and-display) lots: Most Green P parking lots operate 24 hours per day, 7 days per week with no restrictions. In certain limited circumstances parking is restricted overnight. If you attempt to buy or extend parking into these prohibited times the transaction will not be permitted. In addition, some Green P parking lots have periods when parking is allowed free of charge. If you attempt to start a session during one of these free times, Green P Mobile Pay may allow you to complete your transaction to purchase parking for a future time in the app, so make sure to review the session end time on your confirmation screen before you confirm payment.