[
Date Prev][
Date Next][
Thread Prev][
Thread Next][
Date Index][
Thread Index]
[
List Home]
|
[sumo-user] Publics Roads (BPR) formula
|
- From: François Vaudrin <francois.vaudrin.1@xxxxxxxxx>
- Date: Fri, 19 Nov 2021 03:07:34 +0000
- Accept-language: fr-FR, en-US
- Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=ulaval.ca; dmarc=pass action=none header.from=ulaval.ca; dkim=pass header.d=ulaval.ca; arc=none
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=2+faR+mpP8RsyH+Z0pbQLto2Fss1R1p47pHZFrJL8AQ=; b=AYu6i0M6JDKJHCgmAHDD0GGIGrIRsdThLgxOAHe946LIBqGiOGHgx4sp5MZqc5olcMKCSSvl7XOtDSRq9NaCFEto6nKUAyH+/YKgCfFrUBOPekPOy296QDHDtX+emkPd+GYAaS4RfNl3fUWbocSlYswcmrAEzV8l0s88QfOaZlOrlVfzctZqw4VowyyPE5hA8g3tCDr4ZxULZRvFggRSHaA9LaqwkqAfSr+ASxmTjJXDdw/VHJ8Bh7rcaunCAH2Af3XSoDQ9Cxeerf/gORzb6iHQWxIh0TV0CLLfEP0TFqBw0EH15ZamJmq2DHtiJNc4ZrhMuTy0hPkATGdQ2vFDbA==
- Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=a1dWi3oc5fi8FERGkHqfB/YrvBNuIIvOEEkDjjOJSn06jNuGHdzWt/9HAy9uXGnLKRhWaPhT8OB2oWhBZSIEcFogLz7mfpYszIN0oe+nHepvFwsAhZI4OUge3uwNg298KvqASO87aBDKqI0Ts08S5WEhDrFWJGQd/xb9yVJFJmXJPFsVytOAETQqFD93MATME39gSB1XbnqDGJYAUnBi//BwTiCUPKuka4iggHWKKQPf+3TeqfFGtsN6Iy8eqrgb5CuNKKSPI6w78lFX+uMD7Ft3h7NBUSFGX2AyByoS+JnSN93+2zGiu7PmG4tuzyX11myIMESiS+9uVLhdQieCeA==
- Delivered-to: sumo-user@xxxxxxxxxxx
- List-archive: <https://www.eclipse.org/mailman/private/sumo-user/>
- List-help: <mailto:sumo-user-request@eclipse.org?subject=help>
- List-subscribe: <https://www.eclipse.org/mailman/listinfo/sumo-user>, <mailto:sumo-user-request@eclipse.org?subject=subscribe>
- List-unsubscribe: <https://www.eclipse.org/mailman/options/sumo-user>, <mailto:sumo-user-request@eclipse.org?subject=unsubscribe>
- Suggested_attachment_session_id: c94fb866-06ba-764d-9952-b32b334ecc8e
- Thread-index: AQHX3PC3XzSDeQvx0kyQTr8oSISlOA==
- Thread-topic: Publics Roads (BPR) formula
Hello everyone,
Has anyone ever tested the Bureau of Public Roads (BPR) formula with SUMO?
This formula was developed in the 1960s by the BPR to estimate travel time as a function of road capacity under free-flow conditions (such as on a highway). The transport time increases exponentially
depending on the capacity of the road (see diagram in the attached file).
We would like to reproduce these phenomena with SUMO by gradually increasing the traffic flow and measuring the total time to empty the network. We then reproduced the results on a graph to check if
it is similar to that of the BPR.
The problem is that we are not getting an exponential function, but a straight line (see results in the attached file)
and that is not what the BPR predicted in the 1960s.
Does that make
sense?
Do we have to introduce a bottleneck (or reduce the speed) at the end of the network to create a queue or traffic jam?
Thank you
|
Attachment:
Question-SUMO-Users-Bureau of Public Roads function.pdf
Description: Question-SUMO-Users-Bureau of Public Roads function.pdf
