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Mobility and Transport

Congestion and delays indicator

Definition

Delays in road traffic and in public transport during peak hours compared to off peak travel (private road traffic) and optimal public transport travel time (public transport).

Parameter

Weighted sum of delays over representative corridors for road private and public transport.

For road private transport, sum of weighted averages over 10 representative corridors for car trips as a ratio of peak period travel times to off-peak travel times.

For (road) public transport, sum of weighted averages over 10 representative corridors for public transport trips as a ratio of peak period travel times to estimated optimal travel time.

ind08-formula.png

CDij = Congestion and delay index (percentage delay during peak hours) [% of delay]
CTi = Number of car trips during peak hours on main road corridor i [#]; If this information is missing, the number of lanes could be used as an alternative weighing factor
PHTi = Car travel time during peak hours on main road corridor i [minutes]
FFTi = Off-peak car travel time on main road corridor i [minutes]
PTj = Number of public transport trips during peak hours on transit corridor j [#]
PTPHTj = Public transport travel time during peak hours on main road corridor i [minutes]
PTOTj = Optimal Public Transport travel time on main road corridor i [minutes]
MSroad = Modal share road [%] (modal share as the number of persons which are travelling, modal share when only considering private car and PT as possible modes)
MSpt= Modal share public transport [%] (modal share as the number of persons which are travelling, modal share when only considering private car and PT as possible modes)

Data sources

Information needed

Possible specific sources

Costs*

Advice to fill data gaps and/ or improve data quality

Number of car trips during peak hours on 10 main road corridors

Information on the number of cars on a corridor could be derived from traffic counts, urban traffic models or, as a proxy, the number of lanes could be used (for peak time).

M/H

  • Unfortunately, there are no alternative sources of data.

Car travel time peak hour

The use of Floating Car Data, or data resulting from floating car data, as a basis for the estimation of actual vehicle travel time (during all times of the day) is strongly suggested. Data can be provided, for example, by services such as Google Maps, Waze, etc.

L/M

  • It is possible that the information is already available at the local traffic department.
  • Data might be retrievable through Sustainable Urban Mobility Plans (SUMPs) and/ or other related traffic and mobility plans.
  • Take into account online free of charge tools and public transport timetables to estimate travel times. For example, Google Maps provides real-time travel time data for car trips: enquiries at particular times (peak/ off-peak) on selected corridors can provide a quite reasonable estimation of travel times.

Car travel time off peak

Number of public transport trips during peak hours on 10 main corridors

Information on the number of PT trips on a corridor could be usually provided by PT authorities or operators or could be derived from urban transport models.

M/H

  • Public transport providers, while they often have good data on this, might not be willing to share it. In this case, direct observation through on-site surveys (passenger counts) is the main alternative for assessing the number of public transport trips (especially for bus and tram lines).

Public transport travel time during peak hours

For travel times and number of trips of public transport, it is best to consult with the public transport providers.

L/M

  • It is possible that the information is already available at the local mobility department or public transport operators.
  • Take into account online public transport timetables to estimate travel times.
  • “Optimal public transport travel time” can be calculated using travel times of late-night services (if a urban area has a night PT network) or early Sunday morning services.

Optimal public transport travel time

* The column “Costs” provides a qualitative assessment of the budget (staff costs, time, costs for data acquisition, etc.) needed by a city/ urban area for gathering new quantitative data in absence of already available values. For each parameter, the assessment takes into account both the administrative costs and the costs related to searching, acquisition and processing of the needed data; these can be high (“H”), medium (“M”) or low (“L”), or a combination of a pair of them.

Files

Download

To download the indicator spreadsheet, click

sumi_ind08_congestion_and_delays_for_dg_move_website.xlsx
English
(35.23 KB - XLSX)
Download

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Download

To download the indicator spreadsheet, click

sumi_ind08_congestion_and_delays_for_dg_move_website.xlsx
English
(35.23 KB - XLSX)
Download

.