Before I had any surgery my neurosurgeon recommended the same over-the-door kit that desertrat25 has. I used it for a few months and it really helped with the arm pain and numbness. I kept it and used it whenever the radiculopathy symptoms were getting worse. That's what they're helpful for.
Unfortunately I ended up with myelopathy too, which is compression of the spinal cord, not just the nerves going into the extremities. I can't see that any kind of traction would help with myelopathy unless it was being caused by bulging or herniated disks. Is this what is causing your cord compression? If the compression is coming from bone spurs or osteophytes, then traction probably won't help.
Good luck.