Logic Masters Deutschland e.V.

It's so foggy outside that everything has turned greyscale. Can you help Zibl find the right bus line? He's supposed to be on the purple line (Renban).

Rules:
1. Normal Sudoku rules apply. Place the digits 1 - 9 in every row, column, and box.

2. KROPKI: Digits separated by a white kropki dot are consecutive. Digits separated by a black kropki dot are in a 1:2 ratio (one digit is double the other).

3. QUADRUPLES: Cells surrounding a large white circle must contain the digits in the circle.

Special constraint:
There is one of each of the following lines in the grid, it's up to the solver to determine which one is which.

1. RENBAN: Digits along the renban line form a consecutive, non-repeating set in any order.

2. THERMOMETER: Digits along a thermometer increase from the bulb end (the bulb is in row 7).

3. GERMAN WHISPER: Adjacent digits along a German whisper line must differ by at least 5.

4. REGION SUM LINE: Box borders divide the region sum line into segments which all sum to the same total.

5. DUTCH WHISPER: Adjacent digits along a Dutch whisper line must differ by at least 4.

Click here or the image to solve the puzzle in SudokuPad.

This is the fourth in a series of puzzles meant to work as a "Day in the life of Zibl". Once the other puzzles are released I will link to them below.

1. What is Making That Noise?
2. Time to Get Ready!
3. Breakfast Time!
4. Taking the Bus - You are here!

To be released:
5. Whiteboard / Work Meeting
6. Lunch Break
7. Double-Booked
8. Secret
9. Secret
10. Secret