Road closed at this point until 2022. According to the city's transportation services:

"In the approval process for the Cataraqui Estates Business Park, the Ministry of Transportation (MTO) stipulated that the intersection of Centennial Drive and Gardiners Road must be upgraded prior to opening the extension of Centennial Drive. The Ministry of Transportation (MTO) has approval authority given the proximity to Hwy 401. The design of the Gardiners and Centennial intersection is underway and pending design completion and appropriate approvals the construction is anticipated to begin in 2022.Once the intersection work is completed the City will be able to open this section of Centennial Drive that connects the Cataraqui Estates Business Park to Gardiners Road to vehicles."

...so I've marked this as a closed gate for now, but what's actually there are "Jersey wall"-style temporary construction barriers. Most annoying.

Dental office coming soon

correct name: David Dunlap Observatory

concrete block of unknown use

#EveryDoor

Belwood Post Office
8460 Wellington Road 19
Determine exact position.

There is a small connecting road between 3rd Line and Road Three A Private where the cottages are.

via StreetComplete 51.1

Attached photo(s):
https://westnordost.de/p/154516.jpg