R: Speed-Flow data for Californian Freeway

lane2 {hdrcde} | R Documentation

## Speed-Flow data for Californian Freeway

### Description

These are two data sets collected in 1993 on two individual lanes (lane 2 and lane 3) of the 4-lane Californian freeway I-880. The data were collected by loop detectors, and the time units are 30 seconds per observation (see Petty et al., 1996, for details).

### Usage

    lane2; lane3

### Format

Two data frames (`lane2` and `lane3`) each with 1318 observations on the following two variables:

flow

  a numeric vector giving the traffic flow in vehicles per lane per hour.

speed

  a numeric vector giving the speed in miles per hour.

### Details

The data is examined in Einbeck and Tutz (2006), using a nonparametric approach to multi-valued regression based on conditional mean shift.

### Source

Petty, K.F., Noeimi, H., Sanwal, K., Rydzewski, D., Skabardonis, A., Varaiya, P., and Al-Deek, H. (1996). “The Freeway Service Patrol Evaluation Project: Database Support Programs, and Accessibility”. Transportation Research Part C: Emerging Technologies, 4, 71-85.

The data is provided by courtesy of CALIFORNIA PATH, Institute of Transportation Studies, University of California, Berkeley.

### References

Einbeck, J., and Tutz, G. (2006). “Modelling beyond regression functions: an application of multimodal regression to speed-flow data”. Journal of the Royal Statistical Society, Series C (Applied Statistics), 55, 461-475.

### Examples

    plot(lane2)
    plot(lane3)

[Package hdrcde version 3.4 Index]