presentación Arias & ColucciTennessee

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ROAD SAFETY AUDIT IN PUERTO RICO

CASE PR-2 Benjamín Colucci, PhD, PE, PTOE

Co-DirectorCentro de Transferencia de Tecnología en Transportación

Wilson Arias-RojasGraduate student

University of Puerto Rico at Mayagüez

¡☺ Welcome ☺ !

What is Road Safety Audit?A Road Safety Audit (RSA) is a process for systematically

checking the safety of road transportation projects, based onsound road safety engineering principles and undertaken fromthe road users' perspectives. A road safety audit provides anindependent assessment of the "anticipated" safetyperformance of a road transportation project at predeterminedintervals by road safety specialists. It is duly noted that theproject design team remains ultimately responsible for the

design.

The objectives of a road safety audit are to:• The main objective of RSA is to ensure a high level of safety forall new roads and traffic schemes.

• To reduce the whole-live cost of a scheme; unsatisfactory designcan be expensive to correct after they have been built.

• To minimize the risks of roads crashes on the adjacent roadnetwork particularly at tie-ins, as well as on the new road scheme.

• To enhance the relevance of road safety engineering in road andtraffic scheme design work.

• To promote the consideration of the safety of all road users in allnew and existing schemes.

In Puerto Rico no study has been realizedbrings over of RSA nor RSAR. What isclaimed by this work is to elaborate a testto fulfill a RSAR on the part of PRHTA(Puerto Rico Highway and Transportation

Authority)

RSA IN PUERTO RICO

Map of Puerto Rico

Objective

• This work consist in analyze a portion of state road PR-2 in the west side of theIsland. This road is part of the NationalHighway System (NHS). This section isincluded between the municipalities of Mayagüez and Sabana Grande, from thekilometer 157 to kilometer 187.

Characteristics of the road

• Road of 2 rails in both senses• Crossed from north to south and vice versa

• Width for lane of 12 '• The PR-2 crosses urban, rural zone andzone in construction

Accidents in the PR-2 in the westarea during 2002

120 130 140 150 160 170 180 190 200

Kilometer

A c c i d e n

120 130 140 150 160 170 180 190 200

A c c i d e n

Kilometer

120 130 140 150 160 170 180 190 200

Kilometer

A c c i d e n t

Record of fatalities in the PR-2 westarea between 1998 and 2003

Record of fatalities in the PR-2 west area between 1998 to 2003

A g u a d i l l a

A g u a d a

A ñ a s c o

M a y a g ü e z

H o r m

i g u e r o s

G e r m

S a b a n a

G r a n d e

Municipalities

b e r o f

f a t a l i1998

15.78 km 8.84 km 12 km15.65 km 8 km 7.89 km4.84 km

What is the methodology to follow?

• Road Safety Audit Review• It is realized in existing roads.• With RSAR deficiencies and dangers can be

identified.• The deficiencies and opposing dangers are put inagenda for improvement.

• This audit is proactive and is not realizednecessarily in response to the statistics of accidents.

Auditor team selection

• It must include two or more professionalstrained and experienced on thetransportation area between others.

• The team must be independent from theproject to be analyzed.

Project information

• Average daily transit (ADT)• Accident data

• Standard drawings• Relevant specifications and plans.

Field inspection and analysis

• Data and documentation reviewing to register theinitial impressions

• Inspection has to be done during day and night.

• Using check list as a guide to identified the safetydeficiencies of the road.

• Inspection, data, and documentation reviewing

have to be repeated as many times as the teamthink it would be necessary.

What has been done regardingRSAR in the PR-2 section?

• The auditor team has traveled the section of the road in study , evaluatingand taking pictures of devices such as

• concrete barriers• guard rails• end treatments• pavement conditions

• traffic signs• fixed objects in the side of road• geometric design• pavement marking

• illumination• drainages• intersections• tapers• pedestrian facilities

RESULTS• The existing devices do not comply with NCHRP 350.• Most of the guard rails have been impacted. Nevertheless,

non of them have been fixed.• The location of the Puerto Rico favors the growth of

abundant vegetation, which is a problem since this covers thebarriers, guard rails and traffic signs.

• The pavement marking is deficient, both painting and raisedretro-reflective pavement markers.• Lack of maintenance in all devices along the section.• In the working zone, there has been an inconsistency in the

traffic signs.• The portions of the sections that have been built comply with

the NCHRP 350

The end treatment does not fulfill the specifications.

Solution: change the guard rail and end treatment

Painted crosswalk in work zone

Solution: remove the paint of the pavement

Lane pavemenet marking

Dangerous manhole

Solution: Install guard rail

The end treatment does not fulfill the specifications.Solution: install crash cushion

•It has not marked inthe pavement

•Solution: paint thepavement

•The end treatmentdoes not fulfill thespecificationsSolution: install crash

cushion

Intersection 345

• Impressed barrier

•Solution change theguard rail• Deficient demarcationin the pavement.•Solution: paint thepavement• There are no arrowsmarked on right turnonly lane•Solution•Solution: paint the

Intersection 345

Exists granular material accumulated in the intersection

Solution : remove all material of the surface

Intersection 345

The left turn only laneis very short and they do

not fit trucks with trailerRight

Solution: design taperand install drums andextend the auxiliary lane

Bus stop shelter doesnot have any type of protection for theusers.

Solution: Relocate

Not exist endtreatment

Solution: Change theguard rail and installcrash cushion

Barrier badly installed

Solution: redesign and change the guard rail

Work zone

Deteriorated pavement marking

initiates zone of construction in the road

•Drums in theroadside of the road

•Construction of bridge in theintersection

Left lane closing

Abundant vegetation in the roadside

Solution: apply herbicides or cut the vegetation

Conclusions

• The evaluated zone proves to have many deficienciesdue to the abandon on the part of the governmentalagencies. This has increase the rate of accidentsconsiderably.

• In the construction zone they commit an outrage againstthe well-being of the users due to the fact that the speedlabeling is weak, for what the users of the road do notrespect the maximum indicated speeds, creating this

way a general chaos that is translated in accidents in thecorridor every day of the week.

Conclusions

• The auditor team expect to complete the totality of thesection in study to generate the final report of thedeficiencies and to suggest the correspondingimprovements to increase the safety and at the sametime a precedent in the implementation of a RSAR inPuerto Rico, for which it is expected that PRHTAbegins to apply the methodology proposed in the routeand that the road users feel comfortable and entrustedon having moved for it.

Email: bcolucci@ce.uprm.edu wariasr@gmail.com

University of Puerto Rico at MayagüezCivil Engineering and Surveying Department

presentación Arias & ColucciTennessee

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