Driver chooses the harder option

Showing your drivers license and taking a ticket for attended illegal parking is cheaper and easier than being ticketed or towed for unattended illegal parking.
The purpose of showing your license to the enforcer is for your name and license number to be included on the ticket, so it can be tied up to the correct person.
No parking is allowed along 20th Avenue, due to the high volume of traffic that passes through this road. Likewise, it's prohibited to park on a pedestrian crossing.