Here are a few papers dealing with road restoration/recolonization that may provide the information you seek.
1.Restoration of eroded soil in the Sonoran Desert with native leguminous trees using plant growth-promoting microorganisms and limited amounts of compost and water
Bashan, Yoav ; Salazar, Bernardo G. ; Moreno, Manuel ; Lopez, Blanca R. ; Linderman, Robert G.
Journal of Environmental Management, 2012, Vol.102, pp.26-36
2. Unpaved road verges as hotspots of fleshy-fruited shrub recruitment and establishment
Suárez-Esteban, Alberto ; Delibes, Miguel ; Fedriani, José M.
Biological Conservation, 2013, Vol.167, pp.50-56
3. Restoration methods for abandoned roads at lower elevations in Grand Teton national park, Wyoming
For highly compacted soils in general, both of these highlight the importance of breaking up the compaction:
Infalt, S.B. & T.P. Young. 2008. Forest restoration of campsites at Kings Canyon National Park, California. Ecological Restoration 26:302-310.
Kinyua, D.M., L.E. McGeoch, N. Georgiadis & T.P. Young. Short-term and long-term effects of tilling, fertilization, and seeding on the restoration of a tropical rangeland. Restoration Ecology 18S1:226-233.