Chris Jurewicz

11 Questions 52 Answers 0 Followers

Questions related from Chris Jurewicz

Could you recommend technologies for sourcing motorcyclist traffic data?

Hi, Are there proven and emerging technologies for obtaining road network level: a) motorcyclist traffic volumes (counts) b) their speeds, c) motorcycle classification (from light moped to...

02 February 2022 7,633 11 View

What is the relationship between transport modal shift and road safety?

My colleagues and I are exploring to what extend Safe System / Vision Zero objective of minimising death and serious injury can be supported by modal shift. For example, do you know of reputable...

03 January 2018 1,956 3 View

How to overcome poor traffic accident model (SPF) correlation with historical crash data, where crashes are rare and highly dispersed?

Essentially, this relates to the mathematical problem of naturally poor correlation between low value continuous values (e.g. 0.003) with discrete values (0, 1, 2, etc). Has anyone come up with a...

18 November 2016 6,495 1 View

What are the key crash risk factors for urban local roads?

I'm looking for definitive references on road infrastructure, traffic and operational crash risk factors for urban local roads. By local, I mean non-arterials (access streets, collectors) and...

05 November 2016 4,818 12 View

Intersection entry speed vs. crash likelihood?

Hi, I am wondering if someone has some pointers to references on individual vehicle (or two vehicles) entry speeds into an intersection / junction and the likelihood of a collision. I imagine such...

08 September 2016 3,960 6 View

Comparison between point-speed data and probe vehicle speed data?

Hi, I am exploring use of vehicle probe data which provides average speeds for short links (HERE, TomTom, Google, etc.). Has anyone done validations/calibration studies against conventionally...

04 August 2016 5,437 6 View

Is there a reliable method for estimating effectiveness of multiple treatments at crash locations?

In road safety, treatment of crash locations (black spots) is typically addressed with a single treatment for the most common crash (accident) type. For instance, if there are multiple cross...

22 June 2016 2,468 8 View

Are there reputable methods for quantifying 'walkability' in urban environments?

I am aware of several methods/tools for measuring the ease with which a pedestrian can traverse urban environment. While they make good sense, none of them is based on any traceable research...

13 May 2016 4,575 9 View

Where can I source pedestrian movement data from smart phones (e.g. Google, iPhone)?

Sampling of vehicle movement data from navigation and nomad devices is already possible and practiced. Also I discovered that Strava produces cyclist and runner heat maps online (biased). I...

17 April 2016 728 7 View

Can someone suggest leading research on the relationship between pavement quality and crash risk on motorways?

After doing preliminary research scan (lots and lots of semi-relevant research), I am still looking for research on motorway conditions where pavement quality generally good, and the variation in...

04 March 2016 10,029 5 View

Can you recommend references on pedestrian flow estimation models for roads?

Hi folks, I am looking for solid references on models estimating pedestrian flows along and/or across urban roads (per peak-hour, or per day). Literature searches come up with related research but...

16 February 2016 2,052 8 View