If you go west down the Parkway East I-376 past the Swissvale exit you pass a secret doorway you would never know is there .
Its just 2 steel poles with a steel wire run between them set about 20 ft back from the roadway but its part of several such doorways created to help keep sacred the strict rules of Sabbath for Orthodox Jews in Squirrel Hill. its overgrown with trees now but they are still there
There is also thin wire which runs between telephone poles on Forbes Ave and Murray ave which denote these sacred doorways. Which are kept maintained by a Rabbi
But whats their purpose?
Well Sabbath rules are very strict about not doing work so early every Friday Night in Squirrel Hill
You would see Orthodox Jews in their trade make hats , long black coats and beards walking to the local Synagogue with their Prayer books and shawls maybe an umbrella if its going to rain so they are there for Saturday services because once sabbath happens they are not allowed to carry anything outside their homes .
https://en.wikipedia.org/wiki/Shabbat
So then you have a dilemma how can a wife accompany her husband with a young child while walking to temple when its sabbath ? Because she is also not allowed to push a baby buggy.
Well that's where the Sacred Doorways come in the local Rabbis got together and agreed to create the doorways which create a virtual wall there by making all of Squirrel hill and parts of the surrounding community's as one home .
Known as a Eruvs this invisible wall now allows these activities during the sabbath.
it is carefully maintained and even a Hotline is established so Jews can report problems with Eruvs and check to make sure the Eruvs are in full compliance .
https://www.pittsburgheruv.org/
So as Paul Harvey would say now you know the rest of the story and God Bless all those of the Jewish Faith. From a Christian with a Jewish spelled last name.