Messy. I have used 4 solutions in these instances to get new platform works round signalling equipment, but none is really ideal.
1- Divert the rodding along the 6-foot to the end of the new platform. Probably a bit cramped for that many cranks, but it's amazing what you can do with a good blacksmith.
2- Build a crosswall and plank platform over the signalling equipment, with a space through the walls. The technician will probably lynch you.
3- Build the platform with the front edge cantilevered out, with the rodding between the sleeper ends and platform wall. Again probably a bit awkward with that many cranks.
4- Extend the rodding right through the platform and move the main run to the back of it, probably my favourite.
If providing a second platform were my project I would be looking to get the money from the sponsor for some point motors.