The given maps compare the timeframe and costs of two various road tunnels at the same place.
Overall, from the first map, it is clear that the road tunnel was located underwater and were built between 1986 and 1998. Contrast with second tunnel, it was constructed from 2002 to 2006 and situated below the concrete road.
On the one hand, the cost of the road tunnel from the first map made up 555 million, approximately. It located under the bridge and sea, where cars could drove to sand. The height of this construction comprised about one and half metres, while the width of the road was around 2,2 kilometres. On the other hand, the second tunnel, which were created in 21st century, lay under the city’s road. The height and the width of this tunnel accouted for 2.5 metres and 3.6 kilometres, respectively. In addition, the material of the second road tunnel were stone and clay, which made it more reliable and withstand a heavier load.