While a lot of what Yserb says is accurate, I’m not sure there were any takanos from R Aharon about secular studies. in Lakewood High Schools. There were no yeshiva high schools at all in Lakewood (that had to do with the BMG community) until the 80s, and R Aharon was nifter in 1962. The only high schools R Aharon had a shaychus to were Philly and some of the other Lakewood snifim, such as Long Beach and Scranton, (maybe Adelphia also) and they all had decent high schools from their founding until today.
It is also unlikely to say that there were takanos against sit down restaurants in R Aharon’s days, as it is exceedingly unlikely that anyone even dreamed of such a think in Lakewood back in 1962 and earlier.
As far as the Eruv is concerned; virtually every block, development, schuna, neighborhood has an eruv. And many of them link with many others, letting people carry for some fair distances in some places. What there is not is anything large that connects far apart neighborhoods. Aside from the halachic reasons to exclude a mavoi mefulash d’oraisa, as some would consider Route 9 – Madison/River, there are hashkafic and social reasons not to allow unfettered carrying anywhere and everywhere. The total negation of all Hotza’ah restrictions can lead to decreasing of the kedushas Shabbos atmosphere. I know there are eruvin in Yerushalayim and Bnai Brak and places like those, but the old timers, establishers of the Lakewood community wanted to reduce the hustle and bustle, and therefore discouraged large scale eruvin.