expressway interchange qwerks!

[agentsteel53]

looks like I-78 cut the road in two, and they never built an overpass.  Very odd!

it resembles a common freeway-building technique of the 1940s and 50s (see the Arroyo Seco Parkway in LA), where the on- and off-ramps are not split among the two sides of an overpass, but rather they are all located off to one side.  Here, however, there is no overpass.  It is unclear how one is supposed to proceed along that side street, unless they go down to exit 16, make a U-turn at the diamond interchange, and come back. 

[SSOWorld]

Exit 15 on I-78 in PA has the two ends of the road default onto 78.

I had to look at this to figure out what you meant.

Yeah - definitely wierd - I wonder if that's actually substandard.

[signalman]

It definitely is for trucks.  There was a sign going west saying "No Trucks" the last time I was out there.  Granted it's been several years  since I've been that far west on I-78.