Chapter 8.Traffic control devices Definition and categories ■UTCD ■Traffic markings ■Traffic signs ■Traffic signals
Chapter 8. Traffic control devices ◼ Definition and categories ◼ MUTCD ◼ Traffic markings ◼ Traffic signs ◼ Traffic signals
Traffic control devices defined as the media(媒介)by which traffic engineers communicate with road users "functioned as the conveyor(传递者)of traffic law and regulations Three categories ■traffic markings(交通标线) "traffic signs(交通标志) ·traffic signals(交通信号)
◼ Traffic control devices --- ◼ defined as the media (媒介）by which traffic engineers communicate with road users ◼ functioned as the conveyor（传递者）of traffic law and regulations ◼ Three categories --- ◼ traffic markings (交通标线） ◼ traffic signs (交通标志） ◼ traffic signals (交通信号）
Four ways of communicating ■Color-- ■ Shape--- Pattern--- Legend---
Four ways of communicating ◼ Color --- ◼ Shape --- ◼ Pattern --- ◼ Legend ---
MUTCD Manual on Uniform Traffic Control Devices Developed over 70 years in USA--- ■Uniformity(统一性)--make markings,.signs and signals in consistent and standardized format Warranty(设置依据)--give reasons of installation of markings,signs and signals
MUTCD ◼ Manual on Uniform Traffic Control Devices ◼ Developed over 70 years in USA --- ◼ Uniformity (统一性) --- make markings, signs and signals in consistent and standardized format ◼ Warranty (设置依据) --- give reasons of installation of markings, signs and signals
Markings Defined as lines,line drawings,wording and symbols to regulate and direct traffic flow Painted on the road surfaces Three major patterns--- >Longitudinal markings(纵向标线) >~Transverse markings(横向标线) > Object markers and delineators(物标和反光灯)
Markings ◼ Defined as lines, line drawings, wording and symbols to regulate and direct traffic flow ◼ Painted on the road surfaces ◼ Three major patterns --- ➢ Longitudinal markings (纵向标线） ➢ Transverse markings (横向标线） ➢ Object markers and delineators （物标和反光灯）
Lane markings,edge marking for freeway
Lane markings, edge marking for freeway
SPEED LIMIT 35 Lane markings,edge marking for local street
Lane markings, edge marking for local street
Stop line,crosswalk markings,double yellow line
Stop line, crosswalk markings, double yellow line
Double yellow line on undivided roadway
Double yellow line on undivided roadway
@650= Single solid yellow line Double solid yellow line
Single solid yellow line Double solid yellow line