(12-23-2015, 04:14 PM)GtwoK Wrote: I don't understand. There will be both tall curbs and Jersey barriers between cars and Ion trains?
I believe Jamincan is using the term "Jersey Barriers" to describe the temporary, segmented ~1m high concrete walls which can be placed in short order to provide some level of crash protection at a construction site (right?), not a permanent, poured, continuous metre-high barrier:
Temporary concrete barrier
I would imagine these are being installed to protect the workers from the higher-speed traffic on Northfield during construction. I haven't been across the bridge in weeks; I, like many others, avoid driving in that area now like the plague!
Here's a cross section of the track and ground profile on the bridge, taken from page 16 of this document. Note the ~300 mm high curbing here, just like the rest of the alignment. Only the bravest of SUV drivers will succeed in mounting these.
Edit - 150 mm high, actually!