Make an account on cyverse and host your large files there, then link them in a custom track on ucsc. Can be bigwig or bam if I remember rightly - check out the instructions on ucsc.
You can find the roadmap data if you look in the track hub section - "Roadmap Epigenomics Data Complete Collection at Wash U VizHub" on Hg19 and hg38. Hope this is what you are looking for?
