Highways Agency Report

             Shelfmark: SSR/TRL/IN2
       Personal author: Barratt D A
                 Title: Speed/flow relations in the passenger tunnel at
                        Heathrow Airport
             Publisher: Transport and Road Research Laboratory, 1973
  Physical description: 6p., ill., charts, maps
                 Price: Unpriced
                Series: Internal Note IN.0017/73
       Notes - general: Abstract: Traffic speed and flows were observed over a
                        period of 23 hours at this tunnel in October 1972 to
                        ontain speed/flow relations.  There is nothing in
                        these results to suggest that the speed/flow relations
                        in road tunnels differ materially from those
                        pertaining to other roads.
               Keyword: Tunnel
               Keyword: Speed Control
 TRRL INTERNAL NOTE
  copy:1       id:54046000301265      library:SSR          location:SSR-SHELF