# Tagged Questions

Transportation is the movement of anything from one location to another.

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### Plot the Shortest Paths in a Grid without any clash at a point of time

The efficient algorithm needs to be done and proved for the best solution for the given problem: User inputs: (#) Size of the NxN Grid. (N); (#) No. of Paths: Z; (#) Source and Destination ...
204 views

### create minimal spanning tree using table of distances between nodes rather than TSP

I am working on a transportation (linear programming) problem. Each potential solution also requires checking the distance of approx 20,000 routes with 5 to 15 nodes per route. Calculating the ...
541 views

### NYC Subway Line Station Order?

I've currently got data on the NYC subway stations (including name, position, and how many people entered and existed during a timeframe). Also, I have the data on which stations have which train ...
319 views

### Where can I get public transportation route information for USA?

I'm trying to find a list of public transit route information, mainly location of bus and train stops for the US. I've looked around at some of the Google products and openstreetmap but can't find ...
237 views

### High quality public transport trip planner examples? Trip visualization examples?

Do you know high-quality online public transport route/trip planners? I'm looking for sites with recognized usability, most carrier-owned planners are bad or very bad from Human-Computer Interaction ...
2k views

### Find a proper path between two nodes in a grid

This question is about finding a proper path (route) between two nodes (P,Q) in a grid (i.e., graph, network, ...). In our concept, we define a path proper (nice) if it is the most similar* to the ...
141 views

### OpenStreetMap XAPI request for “Member Of”

I'm trying to find a way to request public transportation info from the OSM XAPI. Those nodes can be best described as: highway = * member of = ( route = bus ) Is that even possible to do over the ...
347 views

### Create an optimized point layer derived from a road layer so that the driving distance between each point is x

Consider a classic state-wide or country-wide roadway network. I want to create a point layer, where each point is on the roadway network. This point layer will have each point separated by its ...
433 views

### Reinventing the wheel: Public Transit System

I'm building a public transit service in South Africa, and I initially started the project on PHP and MySQL. I've managed to get far with the simple stack, with: Routing algorithm in PHP Data ...
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### Are there open standards for storing multi-modal routing graphs?

I'm looking for any open standards (or maybe best practices) for storing multi-modal routing graphs, eg. info for pedestrian, bike, public transport and car routing, etc. Every data provider seems to ...
9k views

### Looking for a World Airport Database

I'm looking for a database that contains all (most, many...as many as it can) world airports. I know of one such set available - http://www.world-airport-database.com/database.php - but the terms ...
575 views

### Looking for best practices for determining turn penalties

Shortest path routing will often return routes with a lot of turns (zigzag shape). If you want to get routes with fewer turns, you can use turn penalties to make turning more "expensive". What are ...
532 views

### Using OSM data, pgRouting, and dummy data to develop an origin/destination travel matrix

Further to my previous question I was wondering if it is possible to add dummy node data without to do routing analysis. ISSUE I have a polygon layer that represents zonal attributes I created a ...
213 views

### Literature on public transit network connectivity metrics

Are you aware of any literature or best practices for measuring the connectivity of a public transit network, taking both route geometry and the schedule into account? In other words, I'd like to ...
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I have been looking for data of Mexico. What I am looking for is the data of a Transportation in Mexico, specifically Chihuahua province. I have checked out on ArcGIS online and Google but came up ...
4k views

### How can I optimize pgrouting for speed?

I am using pgrouting on a postgis database created through osm2pgrouting. It performs very good on a limited dataset (3.5k ways, all shortest path A* searches < 20 ms). However since I have ...
142 views

### Vehicle travel data for the USA

I'm looking for vehicle travel data in the USA - at any spatial resolution smaller than the unit of a state, and ideally at a city level. I'm interested in daily, or weekly data and also any ...
1k views

### Database design: road topology in GIS

Is there a standard or a best practice way to store certain features about roads: Road directionality: One way streets: Roads going in one direction only Center Turning lanes: roads that exist ...
552 views

### Calculating order of points along a line

I have a shape file with transportation lines and another file with all bus stops along each line (with an attribute which links stops with specific lines to which they belong). I need to calculate ...
2k views

### Retrieve speed and number of Lanes in Google Maps API, OSM data or any other stream?

Is it possible to return the posted speed and number of lanes of a highway segment using Google Maps API, OSM data, or any other stream (paid for or free)?
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### Calculate stop times/distances of transport lines - tools and procedure?

I need to calculate stop times of bus lines (extrapolation) I have: Shape file with all stops shape file with control points where bus time was taken Shape file with all bus routes csv file with ...
156 views

### Finding intermediate points and speed over a segment

I have a dataset which is in the form of ( Time , Car ID, Speed at that moment, Lat,Long) and I need to do some machine learning on the data to answer the following questions : Best route from ...
1k views

### Recommendations for road maintenance management (on a small scale)

I am in a road association and we maintain our own 3 mile dirt road. In doing research on best practices for maintenance I discovered that other organizations use some mapping/GIS programs to help. ...
399 views

### Examples of web based Overweight/Oversize load permit routing on County Roads

Does anyone know of any US counties that have set up a web based overweight/oversize load permit routing system, preferably one that leverages GIS? I know many state DOT's are doing this, but I don't ...
982 views

### Realtime traffic data provider(s)

What services provide realtime (or daily-updated) basic traffic informations for Western Europe ? For example, traffic.com/Navteq provides such data to Bing Maps for US/Canada and Microsoft suggests ...
107 views

### Non-Research Transportation Raster applications

My experience with rasters is pretty basic. 99.95% of what I do involves vector and transportation modelling. In research, there are numerous transportation applications using rasters and imagery ...
807 views

### Help on creating a presentation for Highschool students

I was commissioned to do a presentation on GIS (well it'll mostly focus on transportation GIS) for about 50 high school students. I'm looking for funny graphs / images that I can include in this ...
7k views

### Curved point-to-point “route maps”

I have recently been looking at airlines web pages that display their routes departing a certain city to all other cities they service. I would like to be able to create similar curved routes between ...
789 views

### Trip travel matrix on OSM data

Here's my situation: I'm modeling travel logistics I have 1,000 nodes, on my road network I'd like to generate the minimum driving time distance between all these nodes This process will be done 24 ...
276 views

### Custom, low-level representation of streets and traffic rules

I'm new to GIS, and I'm still trying to gain an understanding of what can be represented in the various GIS files. Very generally I know(/think) that you can represent points, that lines, polylines, ...
5k views

### Representation of network flows

This is a sample transportation network flow I've done a year ago based on 26 zones. For a project I'm working on now, I need to represent the flows over 1,000 zones with directionality. Any ...
1k views

### Buffers of public transportation transit times

I'd like to be able to create buffers/zones/rings of transit times using Denver's public transportation system. For an example of what I'm talking about, check out triptropnyc.com - I don't need it ...