Sources

• Distances, the line of the road and fuel pumps: © OpenStreetMap contributors, Open Database Licence. Routes worked out with the Open Source Routing Machine.
• Heights: NASA Shuttle Radar Topography Mission, public domain, served by Open Topo Data.
• National Highway 181 (India)

  en.wikipedia.org · Encyclopedia

• Ooty | Udhagamandalam | Hill stations in Tamil Nadu

  tamilnadutourism.tn.gov.in · Official page

• Ooty

  en.wikipedia.org · Encyclopedia

• Explained | Why people in Wayanad protest traffic ban through…

  onmanorama.com · News report · dated 10 December 2020

• Much ado about a highway

  india.mongabay.com · News report · dated 8 November 2019

• TN bans night traffic in tiger territory

  deccanherald.com · News report · dated 12 August 2010

• The Nilgiris District, Tamilnadu | The Queen of Hill Stations…

  nilgiris.nic.in · Official page

• Explained: E-Pass System In Nilgiris And Kodaikanal

  outlooktraveller.com · News report · dated 9 October 2024

• Madras HC orders relaxation on e-pass for tourists to Nilgiris…

  dtnext.in · News report · dated 14 March 2025

• Ooty E-Pass 2026: Apply Online, Price & TN ePass Login

  ootymade.com · Published guide · dated May 2026

• The Nilgiris vehicle e-pass, made simple

  visitnilgiris.org · Published guide

• Nilgiris: Kalhatti Ghat Road Closed to Tourists

  thechenabtimes.com · News report · dated 29 April 2026

• Ooty Kalhatty Road Blocked 2026: Complete Guide

  karpagamresidency.in · Tour company's page · dated 8 May 2026

• NHAI bans two-wheelers, autos on Bengaluru-Mysuru Expressway

  thefederal.com · News report · dated 26 July 2023

• NHAI Provides Alternate Route for 2/3-Wheelers on Bengaluru-Mysuru Expressway

  psuconnect.in · News report · dated 3 August 2023

• Plastic Free Nilgiris

  nilgiris.nic.in · Official page · dated 25 September 2026

• TN ePass

  epass.tnega.org · Official page

• ಕರ್ನಾಟಕ ಅರಣ್ಯ ಇಲಾಖೆ - ಮುಖ್ಯಪುಟ

  aranya.gov.in · Official page

• National Highways Authority of India, Ministry of Road Transport &…

  nhai.gov.in · Official page

• Mudumalai National Park

  en.wikipedia.org · Encyclopedia

• Nilgiri Ghat Roads

  en.wikipedia.org · Encyclopedia

A gap is not a fact. It means we looked and found no source.

• No official page found that states whether motorcycles need the Nilgiris electronic pass; two independent guides say they do.
• Guides disagree on whether the pass is needed all year or only in the controlled season from April to June.
• The electronic pass website opened but its form would not load, so its own wording on who needs a pass is not recorded.
• No official Karnataka page found for the Bandipur night closure hours; the hours, and the earlier cut-off for two-wheelers, come from news reports of the 2009 order.
• Not confirmed whether the summer 2026 closure of the Kalhatti ghat to visiting vehicles is still in force in September 2026.
• A green tax at Nilgiris check posts is reported by blogs; no official page states it or what motorcycles pay.
• No source found for the usual number of days riders take.
• Hairpin bend counts are added as header.hairpin_bends, which is not in the schema example.
• One video only; filming date not known. A second candidate could not be checked.
• Some stretch distances are doubtful. The open map may not know the road riders use, so the routing service went the long way round.