What does this sign mean?

• There is a sharp right turn ahead. Drivers must turn their vehicles slowly.
• There is a narrow bridge ahead. Drivers must switch to low gears.
• The lane ahead is closed for road work. Drivers must merge into the open lane.
  Explanation:

  "This road sign is used to inform drivers that one or more lanes ahead are closed due to road work, and they must merge into the remaining open lane(s)."
• The pavement ahead is narrow. Drivers must reduce their speed.