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 These software applications were developed by the Oregon Department of Transportation to assist in performing certain transportation system analyses. They are free to download and use (are subject to the Disclaimer and Limitation of Liability detailed below). Outside technical support for this software is not provided.
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| TruckSum Spreadsheet |
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The Trucksum Spreadsheet is used to process ODOT-counted 12-hour or greater counts. These counts are provided in electronic form in "Trucksum" format from the Transportation Systems Monitoring Unit. For information on how to use this spreadsheet, see Chapter 11 of the Analysis Procedures Manual.
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| Roundabout Calculator |
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Roundabout Calculator
ODOT roundabout capacity analysis will employ the NCHRP Report 572 method. To expedite analysis, spreadsheets have been developed. The roundabout calculator spreadsheet inputs: entry volume, truck percentage, truck equivalent, Peak Hour Factor, and heavy vehicle factor for each approach. With these inputs, the roundabout calculator spreadsheet produces conflict flow volumes, entry capacity, v/c ratio, control delay, Level Of Service, and the 95th percentile queue for each approach. The APM describes ODOT’s adopted analysis of roundabouts and explains the roundabout spreadsheets with examples. There is a read page and four other spreadsheets. The spreadsheets are in the order of design progression: single lane roundabout, bypass lane (if there is a heavy right turn volume), multilane roundabout, and bypass lane for a multilane roundabout.
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| SIGCAP |
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- SIGCAP - SIGnalized Intersection CAPacity Analysis Program (Windows self-extracting zip file)
- SIGCAP2 is a signalized intersection capacity analysis tool for planning purposes. It calculates intersection level-of-service (LOS) using the volume-to-capacity (v/c) ratio.
SIGCAP and SIGCAP2 are based on the older 1985 Highway Capacity Manual (HCM) methodology, therefore, should only be used for ballpark estimations. Only software based on the current HCM shall be used for traffic analyses.
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| Preliminary Traffic Signal Warrants |
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Preliminary Traffic Signal Warrant Analysis Form (pdf version)
Preliminary Traffic Signal Warrant Analysis Form (Excel calculator version)
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| EISBase |
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To be added.
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| UNSIG |
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UNSIG - UNSIGnalized Intersection Analysis Program (Windows self-extracting zip file) This is the latest version of UNSIG10 (18 October 1988). It is an un-signalized intersection capacity analysis program designed to essentially duplicate the procedures from the Transportation Research Board 1985 Highway Capacity Manual.
UNSIG10 is based on the older 1985 Highway Capacity Manual (HCM) methodology, therefore, should only be used for ballpark estimations. Only software based on the current HCM shall be used for traffic analyses.
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| DISCLAIMER |
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Software and manuals are distributed "as is" without warranty of any kind, either expressed or implied, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of this program is with you. You are advised to test the program thoroughly before you rely on it. Should the program prove defective, you (and not the Oregon Department of Transportation or the State of Oregon) assume the entire cost of all necessary servicing, repair or correction. Any liability of seller or manufacturer of this software will be limited exclusively to product replacement.
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| LIMITATION OF LIABILITY |
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In no event shall either party be liable for any direct, indirect, incidental, special or consequential damages, or damages for loss of profits, revenue, data or use, incurred by either party or any third party, whether in an action in contract or tort, even if the party has been advised of the possibility of such damages. The Oregon Department of Transportation’s liability for damages hereunder shall in no even exceed the amount of fees, if any, you paid under this agreement, and if such damages result from your use of the program, such liability shall be limited to fees paid for the program.
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