1.1.make.import.data    making and importing data
1.2.export.data         exporting PEMS data
2.2.1.generic.pems.handlers
                        Generic handling of pems objects
2.2.2.generic.pems.element.handlers
                        Generic handling of pems.element objects
2.2.pems.structure      'pems' object structure
2.3.1.merge.data.pems   Merging data and pems objects
2.3.2.conditioning.pems.data
                        Data conditioning for pems data
2.3.3.time.handlers     pems Data Time Handlers
2.3.4.unit.handlers     data unit handlers
3.1.1.common.calculations
                        Common calculations
3.1.2.vsp.calculations
                        Vehicle Specific Power (VSP) calculations
3.1.3.emissions.calculations
                        Emission calculations
3.2.analysis.summary.reports
                        Generating summary reports
3.3.pems.plots          Various plots for pems.utils
4.1.example.data        example data for use with pems.utils
4.2.look-up.tables      reference data for use with pems.utils
5.1.1.common.check.functions
                        common check... functions
5.1.2.corrections       Corrections
5.2.pems.tidyverse.tools
                        Functions to use tidyverse code with pems.utils
                        outputs
pems.utils-package      pems.utils
