switch from buses to streetcars. Mitch Stambler, the TTC's manager of service planning, responded by pointing out that streetcars offer a smoother and quieter ride, zero emissions, and economic development. Ridership increased from 26,000 per day on the 77 bus route to 35,000 per day on the Spadina streetcar in 2004 and to over 45,000 per day in 2005–2006. Streetcars on the Spadina portion run every 2–3 minutes every day. On December 15, 2008, the next vehicle arrival notification system was installed for the 510 streetcar in the Spadina and Union subway stations. The next vehicle arrival notification system includes a display screen that shows the location of the streetcars in "real" time with a delay of one minute. On June 18, 2012, all streetcar service on the line was suspended and replaced by buses. This was to allow major track work to be completed in preparation for the TTC's new low-floor Bombardier Transportation custom-made Flexity Outlook streetcars which were scheduled to enter service on the Spadina line in 2014. The upgrades were completed and full streetcar service was restored two years later on August 31, 2014, including a ceremony at 10:00am when the first two accessible low-floor Flexity vehicles officially entered revenue service. On September 6, 2015, after a 13-year absence, the TTC reinstated its overnight service on this route. The night service was designated first as 317 Spadina (based on the overnight equivalent from the 77 Spadina bus era) before being renumbered 310 Spadina on September 3, 2017 (to better align with the current overnight equivalent of the 510 Spadina line), and was part of the expanded Blue Night Network streetcar services resulting from a $95 million investment from Toronto City Council. During overnight periods, streetcars operate approximately every 30 minutes. The TTC had operated an overnight service using buses on Spadina from 1987 until 1992 when it was discontinued due to a series of cutbacks in TTC service. On May 14, 2018, 510 Spadina became the second streetcar route in Toronto (after 509 Harbourfront) to use a pantograph instead of the trolley pole for electrical pickup. On May 10, 2021, the service was shortened to operate along Spadina Avenue from Spadina station to Queens Quay and Spadina only, to allow for an increase of service along the line. However, the 310 Spadina Blue Night service remained unchanged and continued to operate from Spadina station to Union station.