This PR adds all bus lines from the Großraum-Verkehr Hannover. Operation between the lines is split between the two operators regiobus and ÜSTRA. Some lines had inconsistencies between the 3 plans. Wherever this happened, I chose to use the color from the city plan (GVH Bus Hannover), because it has the highest clarity. In general, there is only a small set of colors that is reused for all the lines. On the regional plans though, some lines had colors ever-so-slightly different from "well-known" colors, these were adjusted to the well-known color values. Where colors deviated more noticeably, the original color values were retained.
This PR adds all bus lines from the Großraum-Verkehr Hannover. Operation between the lines is split between the two operators regiobus and ÜSTRA. Some lines had inconsistencies between the 3 plans. Wherever this happened, I chose to use the color from the city plan (GVH Bus Hannover), because it has the highest clarity. In general, there is only a small set of colors that is reused for all the lines. On the regional plans though, some lines had colors ever-so-slightly different from "well-known" colors, these were adjusted to the well-known color values. Where colors deviated more noticeably, the original color values were retained.