Training on Falling Weight Deflectometer (FWD)

Dynatest gave introduction of FWD and training for the future FWD operators in the RAMS unit. FWD will be used on all the paved ABC roads and selected D-roads. In should be noted, that FWD is not able to be used on roads having steep geometry. On the other hand, hot temperature is not limiting the surveys, since results can be corrected with BellĀ“s curve. Busy highways will be measured on low traffic hours, due to safety reasons. [Read More]

Project results

Results of the 8 months implementation phase of the RMMS project were presented to the Ministry of Finance. A separate workshop was arranged for the Ministry of Infrastructure, Ports, Energy and Labour. The consultant has a strong message for not spending on too expensive road construction projects, but to preserve the value of the existing infrastructure and secure optimal maintenance budget in the coming years. After all, we are talking about the value of over 600 million ECD of ABC roads and the value of around 450 million ECD of all the bridges. [Read More]

International Roughness Index for paved ABC roads

International Roughness Index (IRI) was collected for the entire road network. Some of the roads are in such bad condition that the minimum speed of 20 km/h for IRI measurements were not reached. IRI can be used as a Key Performance Indicator for road condition. It should be separated for paved and unpaved roads. Average IRI for paved A -roads is 4.4 mm/m, for paved B -roads the average IRI is 6. [Read More]

Traffic counting results

Traffic counting was done on almost all the roads in A, B and C road classes. Only inaccessible roads were not covered. The counting results were rectified by traffic correction factors, homogeneous traffic segments were identified and the results are now available in the Road Management System. The busiest A-road is A50 from Choc Bridge to Gros Islet. Annual Average Daily Traffic reaches over 27 000 vehicles. The road needs upgrading to 4 lanes. [Read More]

Maintenance Standards

Maintenance Standards

The first version of maintenance standards has been created. The idea of the maintenance standards is to standardise the applied maintenance works on the road network depending on the surface type, traffic volume, surface condition (IRI) and bearing capacity. The maintenance standards are used in maintenance planning when needed periodic maintenance and rehabilitation works are identified.

Pavement Distress Inventory

Pavement Distress Inventory work has started. The idea is to use the collected orthophotos and panoramic images as well as a specialised software to identify pavement defects on the roads. Area of cracking, number of potholes, area of pavement loss and area of edge break are collected in the beginning. The images can later be used to collect other inventory items such as number, type, location and condition of traffic signs and railings. [Read More]

Bridge inspections

Bridge picture

It was thought that there are some 100 bridges in Saint Lucia before the RMMS project started. During the inspections it has been found out that the total number of bridges is over 220. Bridge inventory inspection is on-going and should be finished by the end of July after which maintenance planning of bridges can start.

IRI by roadclass and zone

Workshop picture

International Roughness Index is a key indicator of road surface condition. The main road network (ABC roads) has been mostly completed and the initial results show that the main roads are in decent condition while the collector roads are mostly in poor condition. Later, when maintenance plans are created the IRI of each road and segment will be used in prioritisation of road works.

Digital road network

The previous digital road network of Saint Lucia was digitised from satellite imagery. During the RMMS project the entire digital road network is redone. Currently, most of the ABC roads have been now surveyed, post-processed, cleaned, coded, verified and imported in the road asset database. The advantage of surveying the road alignment with GPS instead of satellite images is higher accuracy for altitude, which is important when road lengths are calculated correctly. [Read More]