The "Ayalon Roofing" above the railways has been approved as part of TAMAL/1045, a plan to expand Bnei Beraq north and connect it with Ramat HaHayal. I drove past the area a few days ago, the new neighbourhood looks well into construction, I don't know about the roofing. I must say, with all their problems, when it comes to long-term planning Bnei Beraq muni really has got their shit together. The new business district is fantastic example.It should be possible to walk through the park and cross into Tel Aviv, but the whole park is a render, there isn't going to be anything there any time soon.
Notice also how they did an "Ayalon Roofing" over the railways – I have not heard any plans to do that, beyond the road bridge itself.