[1 marks]traffic flow survey methodology
A researcher wants to show, on a single sketch map, the total volume and direction of rush-hour traffic flowing along several roads into a city centre. Which mapping technique should be used?
- AIsoline map, drawn by connecting points of equal recorded traffic speed on the roads
- BChoropleth map, using shaded colour bands to show traffic density across each road corridor
- CDot map, using one dot to represent each individual vehicle counted along the roads
- DFlow-line map, using arrows whose width shows volume and whose direction shows the flow