  We study transport across ballistic junctions of materials which host
pseudospin-one fermions as emergent low-energy quasiparticles. The effective
low-energy Hamiltonians of such fermions are described by integer spin Weyl
models. We show that current conservation in such integer spin-$s$ Weyl systems
requires continuity across a boundary of only $2s$ (out of $2s+1$) components
of the wave function. Using the current conservation conditions, we study the
transport between normal metal-barrier-normal metal (NBN) and normal
metal-barrier-superconductor (NBS) junctions of such systems in the presence of
an applied voltage $eV$. We show that for a specific value of the barrier
potential $U_0$, such NBN junctions act as perfect collimators; any
quasiparticle which is incident on the barrier with a non-zero angle of
incidence is reflected back with unit probability for any barrier width $d$. We
discover an interesting symmetry of this system, namely, the conductance is
invariant under $U_0 \to 2(\mu_L \pm eV)-U_0$, where $\mu_L$ is the chemical
potential and the +(-) sign corresponds to particle (hole) mediated transport.
For NBS junctions with a proximity-induced $s$-wave pairing potential, which
also display such a collimation, we chart out the properties of the subgap
tunneling conductance $G$ as a function of the barrier strength and applied
voltage. We point out the effect of the collimation on the subgap tunneling
conductance of these NBS junctions and discuss experiments which can test our
theory.
