38 ALICE Collaboration ALI DTL CIT EXM ALICE@CERN 10.17182/HEPDATA.146104 English Measurements of charged-particle production in pp, p-Pb, and Pb-Pb collisions in the toward, away, and transverse regions with the ALICE detector are discussed. These regions are defined event-by-event relative to the azimuthal direction of the charged trigger particle, which is the reconstructed particle with the largest transverse momentum ($p_\mathrm{T}^\mathrm{trig}$) in the range $8 < p_\mathrm{T}^\mathrm{trig} < 15~\mathrm{GeV}/c$. The toward and away regions contain the primary and recoil jets, respectively; both regions are accompanied by the underlying event (UE). In contrast, the transverse region perpendicular to the direction of the trigger particle is dominated by the so-called UE dynamics, and includes also contributions from initial- and final-state radiation. The relative transverse activity classifier, $R_\mathrm{T}=N_\mathrm{ch}^\mathrm{T}/\langle N_\mathrm{ch}^\mathrm{T}\rangle$, is used to group events according to their UE activity, where $N_\mathrm{ch}^\mathrm{T}$ is the charged-particle multiplicity per event in the transverse region and $\langle N_\mathrm{ch}^\mathrm{T}\rangle$ is the mean value over the whole analysed sample. The energy dependence of the $R_\mathrm{T}$ distributions in pp collisions at $\sqrt{s}=2.76, 5.02, 7$, and $13~\mathrm{TeV}$ is reported, exploring the Koba-Nielsen-Olesen (KNO) scaling properties of the multiplicity distributions. The first measurements of charged-particle $p_\mathrm{T}$ spectra as a function of $R_\mathrm{T}$ in the three azimuthal regions in pp, p-Pb, and Pb-Pb collisions at $\sqrt{s_\mathrm{NN}}=5.02~\mathrm{TeV}$ are also reported. Data are compared with predictions obtained from the event generators $\mathrm{PYTHIA}~8$ and $\mathrm{EPOS}~\mathrm{LHC}$. This set of measurements is expected to contribute to the understanding of the origin of collective-like effects in small collision systems (pp and p-Pb). Journal Article GSI record: GSI-2025-00141 ; PUB:(DE-HGF)32, ; 26, ; Dataset 2024 GSI-2025-00142 2024 https://repository.gsi.de/record/355056 https://doi.org/10.17182/HEPDATA.146104