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Expressway kilometer posts, as latitude and longitude

The kilometer posts (distance markers) along Japan's expressways, delivered as a list of latitude and longitude every 100 m. The Shin-Tomei Expressway sample is a free download; other routes are paid.

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An expressway on a clear day, with a kilometer post reading 67.9 on the median barrier to the right (illustration)

Signs that show the distance from the start of the road, every 100 m

  1. 01

    The number is the distance from the start

    A post reading 67.9 stands 67.9 km from the start of that route.

  2. 02

    One every 100 m on the main line

    They stand on the shoulder or median every 100 m (0.1 km). Posts at each whole kilometer have reversed colors so they stand out.

  3. 03

    A shared way to say where

    On expressways, with no intersections or traffic lights, accidents, roadworks and debris are located as near KP 67.9.

Spacing and colors are based on an interview with NEXCO Central Japan (Source: Norimono News, July 27, 2017, in Japanese)

FIG. 01 — KILOMETER POSTS EVERY 100 Mnear Chuo Expressway KP 67.9
  1. 67.6
  2. 67.7
  3. 67.8
  4. 67.9
  5. 68.0
  6. 68.1
  7. 68.2

One post, one row of data

KP
67.9
Latitude
35.618450
Longitude
138.946686

Linking kilometer post values to map positions lets you handle locations in inspection records, dashcam footage and reports by either KP or latitude and longitude.

View on the map

Check positions every 100 m on the map

The latitude and longitude values come in the data you receive.

FIG. 02 — ROUTES AND KILOMETER POSTS77 routes · 88,156 points
Plan of the Shin-Tomei Expressway (Gotemba JCT to Toyota-Higashi JCT), with kilometer posts every 10 km KP 100 KP 150 KP 200 KP 250 Gotemba JCT Toyota-Higashi JCT 050 km N Kilometer posts every 10 km (data every 100 m)

Route shapes and prefecture borders: processed from National Land Numerical Information (expressway time series and administrative area data)

Ready77 routes

In progress15 routes
On request12 routes

Ready

Shin-Tomei Expressway

Section
Gotemba JCT – Toyota-Higashi JCT
Kilometer posts
52.8–253.1 (2,004 points, every 100 m)
Accuracy being checked
KP 120.3–165.2 (about 45 km)
Price
¥21,000

Sections being checked will be updated in the data once confirmed.

Request a quote for this route

Shin-Tomei Expressway sample

A free CSV in the same format as the paid data, covering the Shin-Tomei Expressway from Gotemba JCT to Toyota-Higashi JCT every 100 m.

Route
Shin-Tomei Expressway (Gotemba JCT to Toyota-Higashi JCT)
Kilometer posts
52.8–253.1 (2,004 points, every 100 m)
Format
CSV (UTF-8)
Download the sample54 KB
See the format (first 5 rows of the sample)
KPLatitudeLongitude
52.835.267101138.913776
52.935.266292138.913309
53.035.265483138.912843
53.135.264674138.912377
53.235.263857138.911935

Inbound and outbound lanes are not separated. Column notes and sources (README)

What you receive

  1. 01

    Kilometer post value

    The number on each post, one row every 0.1 km (100 m).

  2. 02

    Latitude and longitude

    Each post's position as a point on the main carriageway's center line, in WGS84 latitude and longitude.

  3. 03

    One CSV per route

    Each route is one CSV with three columns, ready to open in a spreadsheet or mapping software.

The sample is free; routes are priced by length

Free

Sample

Gotemba JCT to Toyota-Higashi JCT, in the same format as the paid data.

Route
Shin-Tomei Expressway (every 100 m)
Formats
CSV (kilometer post, latitude, longitude)
Get it
Download right here
Download the sample

Per route

One route

¥10,000 per 100 km

A 300 km route costs ¥30,000.

Pricing
¥1,000 per 10 km (rounded up, minimum ¥3,000)
Request a quote

Bundle

Five-route bundle

¥100,000

Good value when you need several long routes.

Route
Any five finished routes
Order

All

All routes

¥600,000

Every route finished at the time of your order.

Route
All finished routes (77 routes, about 8,808 km so far)
Order
  1. 01

    Choose routes

    Use the form to say which routes or plan you want and how you will use them.

  2. 02

    Quote

    You get the price for your routes and payment details. For routes still in progress, feasibility and delivery time are confirmed too.

  3. 03

    Payment

    If the quote works for you, make the payment.

  4. 04

    Delivery

    Once payment is confirmed, you receive one CSV per route.

FAQ

Q.01What can I use the sample for?

It is for checking the format and positions before you buy. If you use it, include the attribution given in the README.

Q.02Which routes can I buy?

Routes marked Ready on the map are available now. Other expressways can be made on request. Some sections may not be possible; you will be told when you ask.

Q.03How is the price set?

By route length: ¥10,000 per 100 km. There are also prices for a five-route bundle and for all routes.

Q.04Can I see latitude and longitude on the map?

No. The map shows positions every 100 m, but not the values.

Q.05How accurate are the positions?

You can check positions on this page's map before buying. Accuracy figures will be published once they are ready.

Q.06Are inbound and outbound lanes separate?

Not in the sample. Where the carriageways run apart, KP values can differ, so mention when ordering whether you need them separated.

Q.07How do I pay?

Payment details come with the quote.

Q.08Do you cover ordinary roads?

Expressways only, for now.

Q.09What format is the data?

One CSV per route with three columns: kilometer post, latitude and longitude. Ask if you need another format.

Start by describing your situation

Whether it is a MICHIKARTE trial or an AI app, your plans do not need to be final. Describe the photos or video you have and what you are struggling with, and you will get an email reply on what can and cannot be done. The contact form is in Japanese, but you are welcome to write in English.

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