A fork of Transportation Networks with better TNTP format:
- Easier to parse
- Numbering of nodes start with 0 (and not 1)
- Removed redundant zeros from some OD tables
There are four types of TNTP files in this repo:
- Network file (
.net.tntp) - Origin-destination matrix/table file (
.odm.tntp) - Edge flow file (
.flow.tntp) - Node file (
.node.tntp)
<Text> in angle brackets in format snippets denotes
some value that is explained below the snippet.
NODES:<nodes>
ZONES:<zones>
NODES:<edges>
END
<start> <end> <capacity> <freeFlow> <length> <speed> <toll> <b> <power> <type>
<start> <end> <capacity> <freeFlow> <length> <speed> <toll> <b> <power> <type>
<start> <end> <capacity> <freeFlow> <length> <speed> <toll> <b> <power> <type>
...
The file starts with header:
<nodes>- Number of nodes in network. The set of nodes is then represented by the numbers 0..nodes-1.<zones>- Number of zones in network. Zones are special nodes, they are the sources and sinks of traffic flow in the network (see OD matrix). The set of zones is a subset of set of nodes and is represented by number 0..zones-1.<edges>- Number of edges in network. Also the number of lines after header.
The header ends with END line, after which start lines describing each edge:
<start>- The node from which this edge originates.<end>- The node to which this edge points.<capacity>- Practical capacity of traffic link represented by this edge.<freeFlow>- Free flow time of traffic link represented by this edge. The time one car would take to cross this link if the link would be otherwise empty.<length>- Irrelevant for STA algorithms.<speed>- Irrelevant for STA algorithms.<toll>- Irrelevant for STA algorithms.<b>- Parameter of BPR function. Might aswell be always 0.15.<power>- Parameter of BPR function. Might aswell be always 4.<type>- Irrelevant for STA algorithms.