  We have measured $R(T,B)$ of a TiN thin-film very close to the
disorder-driven superconductor-insulator transition but still superconducting
at zero field and low temperatures. In a magnetic field we find three distinct
crossing point of the magnetoresistance isotherms occur at magnetic fields
$B_{cX}$ in three different temperature regions. Each crossing point in
$R(T,B)$ corresponds to a plateau in $R(T,B_{cX})$. We systematically study the
evolution of these crossing point near the disorder-induced
superconductor/insulator transition, identify the most promising candidate for
a quantum phase transition, and provide estimates for the two critical
exponents $z$ and $\nu$.
