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Andrew Byrd
Andrew Byrd

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Published in Conveyal

·Jan 17, 2017

Shaping the Transit Landscape of the Netherlands with Conveyal Analysis

Conveyal has partnered with Dutch transportation engineering firm Movares to assess the impact of long-term public transport development scenarios for the Netherlands using our next-generation Conveyal Analysis platform. After a pilot project in Rotterdam and The Hague (the southern wing of the heavily urbanized, polycentric Randstad region), our collaborative…

Transportation

5 min read

Shaping the Transit Landscape of the Netherlands with Conveyal Analysis
Shaping the Transit Landscape of the Netherlands with Conveyal Analysis
Transportation

5 min read


Published in Conveyal

·Feb 6, 2016

Simpler OpenStreetMap Data Exchange, Part II

Last spring I posted an article discussing some shortcomings of the PBF format and proposing a much simpler OSM interchange format called VEX. …

Openstreetmap

4 min read

Simpler OpenStreetMap Data Exchange, Part II
Simpler OpenStreetMap Data Exchange, Part II
Openstreetmap

4 min read


Published in Conveyal

·Apr 28, 2015

Infrastructure for Fast Geographic OSM Extracts

Infrastructure for Fast Geographic OSM Extracts — Conveyal is developing software that performs fast geographic extracts of up-to-date OpenStreetMap data anywhere in the world and delivers them on demand in compact binary formats. The results are promising, and we are now using Vanilla Extract to fetch road network data on demand for use in Transport Analyst. Our needs At…

Openstreetmap

5 min read

Infrastructure for Fast Geographic OSM Extracts
Infrastructure for Fast Geographic OSM Extracts
Openstreetmap

5 min read


Published in Conveyal

·Apr 27, 2015

Simpler OpenStreetMap Data Exchange Formats

Simpler OpenStreetMap Data Exchange Formats — The PBF format appeared at the end of 2010 as a compact binary alternative to the voluminous XML representation of OpenStreetMap data. It was a major step forward, reducing the size of files by half or more and making OSM processing much less resource-intensive. I have made heavy use of…

Openstreetmap

6 min read

Simpler OpenStreetMap Data Exchange Formats
Simpler OpenStreetMap Data Exchange Formats
Openstreetmap

6 min read


Published in Conveyal

·Feb 24, 2015

What is Profile Routing?

What is Profile Routing? — Journey planning is usually framed as an optimization problem: it’s about maximizing or minimizing some criterion. Problems where we must find the best combination or sequence of steps to meet a quantitative goal have been studied in great detail. There’s a specific term for solving them (combinatorial optimization) and a…

Transportation

3 min read

What is Profile Routing?
What is Profile Routing?
Transportation

3 min read


Published in Conveyal

·Jan 9, 2015

Capturing Service Variation in Accessibility Analysis

Capturing Service Variation in Accessibility Analysis — As part of our collaboration with the World Bank to develop analysis tools that support improved transportation outcomes in cities around the globe we have added functionality to OpenTripPlanner that allows efficient calculation of best, worst and average travel times.Trip planning services usually tell you the fastest or easiest way…

Public Transit

5 min read

Capturing Service Variation in Accessibility Analysis
Capturing Service Variation in Accessibility Analysis
Public Transit

5 min read


Published in Conveyal

·Dec 16, 2013

A resource-efficient open source routing library

A resource-efficient open source routing library — The Bliksem Consortium, of which Conveyal is a member, has released its C implementation of a timetable-based public transport routing algorithm under an open source license at http://github.com/bliksemlabs/rrrr. The code is compact and fast enough to run directly on a mobile phone, providing routes even without an internet connection. For…

Transportation

3 min read

Transportation

3 min read


Published in Conveyal

·Oct 2, 2012

Routing with Real-time Vehicle Arrival Updates

Routing with Real-time Vehicle Arrival Updates — OpenTripPlanner and other trip planning systems typically calculate itineraries using arrival and departure times from published timetables. An increasing number of agencies are providing these data openly via GTFS and other formats. However, because of delays, cancellations, and other unforeseen changes in service, the true optimal path on any given…

Public Transit

4 min read

Public Transit

4 min read


Published in Conveyal

·Jul 2, 2012

Visualizing urban accessibility with OpenTripPlanner Analyst

Visualizing urban accessibility with OpenTripPlanner Analyst — OpenTripPlanner has made rapid progress over the last few years and is now being used in production systems providing multi-modal itineraries to public transit riders, pedestrians, and cyclists around the world.However, the routing engine at its core has the potential to answer much more general questions about efficient paths through…

Public Transit

6 min read

Visualizing urban accessibility with OpenTripPlanner Analyst
Visualizing urban accessibility with OpenTripPlanner Analyst
Public Transit

6 min read

Andrew Byrd

Andrew Byrd

14 Followers
Following
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