  The transverse structure of the nucleon as probed in hard exclusive processes
plays critical role in the understanding of the structure of the underlying
event in hard collisions at the LHC, and multiparton interactions. We summarize
results of our recent studies of manifestation of transverse nucleon structure
in the hard collisions at the LHC, new generalized parton distributions
involved in multiparton interactions, presence of parton fluctuations. The
kinematic range where interaction of fast partons of the projectile with the
target reach black disk regime (BDR) strength is estimated. We demonstrate that
in the BDR postselection effect leads to effective fractional energy losses.
This effect explains regularities of the single and double forward pion
production in $ dAu$ collisions at RHIC and impacts on the forward physics in
$pp$ collisions at the LHC.
