U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590

Skip to content
Facebook iconYouTube iconTwitter iconFlickr iconLinkedInInstagram

Federal Highway Administration Research and Technology
Coordinating, Developing, and Delivering Highway Transportation Innovations

This report is an archived publication and may contain dated technical, contact, and link information
Publication Number: FHWA-HRT-04-137
Date: December 2005

Enhanced Night Visibility Series, Volume VI: Phase II—Study 4: Visual Performance During Nighttime Driving in Fog

PDF Version (1.27 MB)

PDF files can be viewed with the Acrobat® Reader®


Valet Protocol for ENV-Objects—Fog

Pre Experiment Duties:

  1. Attend the nightly meeting.
  2. Get the following forms from the front seat experimenter:
    • VES order and diagram hand out.
    • Vehicle prep sheets.
    • Participant eye measurement sheet.
    • Ambient light reading (Lux) form.

  3. Prep the vehicles according to the vehicle prep sheet.

  4. Make sure that you have the following equipment:
    • Flashlight.
    • Radios.
    • Vest.
    • Safety glasses.
    • Eye measurement equipment.
    • Cones.

  5. Park SUV 1 and SUV 2 up at the front of the building.

  6. With the assistance of the onroad experimenters, perform the road prep according to the road prep sheet.

  7. Drop off all onroad staff at their stations.

  8. Make sure that your radio is on channel 8.

  9. Wait for drivers to arrive at turnaround 2.

Duties during the experiment:

When drivers arrive at T2 – Lead Valet

  1. Take eye height measurements for each participant in each vehicle. To do this, first explain to the participant that you are going to make a mark on the window as to where their eye level is located. Instruct them to adjust their seat to where they think they will be comfortable. Once they are situated, tell them to look ahead, relax, and stay as still as possible. Close the door and take the measurements.
    • Use the level (located in valet box) to assess participant’s eye position. Once you have found their eye position mark a “+” on the glass (using a dry-erase marker).
    • Using the “+” as a reference point, take measurements (horizontal and vertical).
    • Take vertical measurement with metal end of tape measure down where the glass intersects with the black plastic.
    • Take horizontal measurement with metal end of tape measure to the right where glass intersects with black plastic.
  2. The first parking space on each side is termed a “vehicle drop off” and needs to be available at the end of every lap. The valet will move any vehicle that is left in those locations to the parking spots outside the turn around.
  3. Whenever possible, the first driver that returns to the middle turnaround should have their next vehicle waiting for them at the foremost parking spot. The valet will need to look at the VES order sheet to determine which vehicle will be used next and which parking spots should be used to ensure that the driver’s wait-time is minimized.
  4. Before driver goes down the road, ensure the headlights are on and working. USE SAFETY GLASSES.

    • SUV 1: If hybrid UV–A is required, make sure they are working. Otherwise, make sure the two HLBs are on.
    • SUV 2: If five UV–A is required, all five should be on. Report if one is not working or extremely dull. The HLB lights should be working at all times.
    • SUV 3: The two HID headlamps on the front of the vehicle should be on.

Shut down procedures:

  1. Pick up all onroad people and all onroad materials.
  2. Sign all the radios back in.
  3. Submit paperwork to front seat experimenter

General notes for the valet.

  1. Outside of the vehicle discussion should be held with the front seat experimenter whenever problems arise or questions need to be answered. At no point should a discussion about the experiment or the road conditions be held within hearing distance of the participant.
  2. While a participant is outside of the vehicle or the vehicle doors are open, the Valet must turn the volume of their radio low so that the participant does not know the nature of the experiment or conditions on the road.


Previous    Table of Contents    References
Federal Highway Administration | 1200 New Jersey Avenue, SE | Washington, DC 20590 | 202-366-4000
Turner-Fairbank Highway Research Center | 6300 Georgetown Pike | McLean, VA | 22101