11. At certain traffic densities , small causes have large effects, 12. Rakha said, " but they give you complete information on traffic density and speed there ." 13. The area is clustered with commercial complexes, showrooms and shopping malls and has high traffic density . 14. In areas of higher traffic density , sometimes bi-directional operation would be established between manned interlocking towers. 15. This type of traffic control devices are used in work zones in high traffic density urban areas. 16. Despite its importance, thanks to its high traffic density , the line remained, operationally, just a branch line. 17. Increasing traffic densities and changing public attitudes led to complaints about aircraft noise and moves to introduce restrictions. 18. The 60 km stretch of the A 92 between Landshut and Plattling has a very low traffic density . 19. This effect is accentuated with high traffic density in areas with commercial uses where speeds come to a crawl. 20. The "'Biham Middleton Levine traffic model "'for a 144 x 89 lattice, with a traffic density of 38 %.