This route is an early fiber optic upgrade of a much older, suspected coaxial cable route that connected the Moseley and Norfolk switches. Route markers can be clearly seen crossing Rt. 40 and dotting numerous farms in Sussex County as well as crossing Nansemond Pkwy. adjecent to Bell Atlantic's Driver CO. Facility spacing is unknown but more huts are suspected to exist since the distance between M-N MH84 and M-N MH38 is roughly 44 miles. That kind of repeater distance is just now being put into use with cutting edge DWDM transmission technology. Currently only Qwest and the AT&T/PF.net next generation backbone employ repeater spacing of 35 to 60 miles (AT&T/PF.net and Qwest respectively).
Hut IDs probably refer to route markers. Although there are no signs of any modern fiber optic match stick markers there certainly are not 84+ regenerator/ OP-AMP sites along this route. Furthermore, MH is a common telco abbreviation for manhole cover and these suspected repeater facilities may be nothing more than sheltered manhole covers.