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1. Guide Lines on Traffic
Management in Work Zones
( IRC:SP:55 -2014)
S.K.Nirmal
Secretary General
Indian Roads Congress
2. Aims and objectives of Guidelines
โข Guidelines on Safety in Road construction Zones was first
published by IRC in 2001. This was revised to include latest
technology of Traffic Management and road safety aspect in
2014.
โข Work zone Traffic Management Plans (WTMPS) to meet the
โข Work zone Traffic Management Plans (WTMPS) to meet the
safety needs of regular traffic as well as works traffic.
โข To facilitate the safe passage of road users through such
work zones
โข Applicable for all categories of roads
โข Basic strategy of a Safe System approach in work zone
3. Topics
โข Principles of work zones Traffic Management Plans
โข Definitions
โข Planning and Design
โข Temporary Traffic Control Zones
โข Traffic Control devices
โข Roles and Responsibilities
โข Roles and Responsibilities
โข Implementation and Operations
โข Traffic Management Plan (TMP)
โข Personnel and safety compliances
โข Typical Layouts
4. Principles
โข 4 Cโs principle: work zones be designed, operated
and maintained such that the works are:
โข Clear,
โข Concise,
โข Concise,
โข Comprehensive, and
โข Credible.
5. Roles and Responsibilities
โข Road Authority
โข Road Operator
โข Project director
โข Designers
โข Road safety auditors
โข Road safety auditors
โข Contractor/ concessionaire
โข Supervision consultant
โข Local Police
โข Road user
โข General Public / Communities
6. WORK ZONE DESIGN STRATEGIES
โข Alternate One Way Operations-
โ for very low volume roads
โ Requires two flaggers or temporary traffic lights
โข Detours- traffic rerouted on alternate road
โข Diversions
- traffic is routed on a temporary road
- can carry one way or two way traffic
- can carry one way or two way traffic
- useful in construction of bridges and culverts
โข Full Road Closures
โข Intermittent Closures - for a short duration of about 30 min
โข Lane closures โ requires barriers
โข Use of shoulder as a Travel lane- requires strengthening of shoulders
โข Night Construction โ mostly in city roads, noise pollution
7. Temporary Traffic Control Zones
โข Advance Warning Zone- Men at work sign
โข Approach Transition Zone
โ use of tapers or with circular curves
โข Activity Zone
โข Activity Zone
- Work Space
- Traffic Space
- Buffer Space
โข Terminal transition Zone
โข Traffic will be redirected to normal path
โข Work Zone end
11. OTHER REGULATORY SIGNS & SIZES FOR DIFFERENT SPEED
Approach Speed
(km/h)
Font Height (mm) Overall Size (mm)
Lower Case Upper Case
ROAD AHEAD
CLOSED
Traffic
Diversion
WORKS TRAFFIC
ONLY
DIVERSION
CLOSED Diversion ONLY
31 โ 50 km/h 75 105 767 x 600 720 x 620 840 x 650 950 x 620
51 โ 65 km/h 100 140 1020 x 800 970 x 820 1120 x 870 1260 x 830
66 โ 80 km/h 125 175 1270 x 1000 1210 x 1030 1400 x 1080 1580 x 1030
81 โ 100 km/h 150 210 1530 x 1190 1450 x 1230 1680 x 1300
1900 x 1240
101 โ 120 km/h 200 280 1530 x 1190 1450 x 1230 1680 x 1300 1900 x 1240
12. REQUIREMENTS OF TRAFFIC
MANAGEMENT PLAN
โข Sound and Optimal Deployment of TTC Devices
โข Prepared and vetted by Competent Personnel
โข Prepared with Due Regard to site Conditions
โข Prepared with Due Regard to site Conditions
โข Planned Prior to Occupying the Work Site
โข Ensured Support from Enforcing Authority
โข Wide Publicity and awareness to Affected
13. PRIMARY FEATURES OF WORK ZONES
โข Adequate Warning, Delineation and Channelisation
โข Smooth Movements Through Temporary Traffic Zones
โข Provision of Separate Pedestrian Routes
โข Location of Temporary Transit Stops and Guidance
โข Prepared and Supervised by Experienced Personnel
โข Prepared and Supervised by Experienced Personnel
โข Continued Monitoring and Modifications
โข Unwanted (Earlier)TC Devices to be Removed
โข Coordinately Planned with Adjacent Projects
โข TTC Should be Removed once Works are Completed
โข Guard and Protect Workers and Equipment
โข Monitor Crashes and Accommodate the Straying Vehicles
