cyclestreets_column_names
                        Prices of 50,000 round cut diamonds.
journey                 Plan a journey with CycleStreets.net
json2sf_cs              Convert output from CycleStreets.net into sf
                        object
ltns                    Download data on 'Low Traffic Neighbourhoods'
                        or 'rat runs' from CycleStreets
smooth_with_cutoffs     Identify and smooth-out anomalous gradient
                        values
