The Journal Of Sustainable Development

 Journal

 Performance Analysis Of Off-Street Parking Around The Central Business District Of Akure Southwest Nigeria

 Oyedepo, O. J.,

 2016

Central Business Districts (CBD) are areas of dense traffic which result in parking problems. Four parks were selected for detailed study in Akure, the capital of Ondo State, Nigeria. Parking surveys were conducted to evaluate their parking index (efficiency) using both close and open-ended questionnaires. Parking index (efficiency) for OFP1, OFP2, OFP3 and OFP4 were obtained as 42.5%, 69.52%, 74.88% and 26.66% respectively. The study shows that OFP1 and OFP4 operated below the maximum capacity at parking index lower than 50%, while OFP2 and OFP3 operated above the maximum capacity when compared with Policy 7 of the Parking Space Requirements in Parking Code Guidance 2012 of San Francisco Department of Transportation. Furthermore,50%, 36% and 14% of the respondents affirmed that the facilities are not adequate, adequate and very adequate respectively. Inadequacy in parking signage and deficiency in enforcement by Management was observed. However, effective communication, parking enforcement, operational efficiency and provision of parking signage should be adopted in the study area. 

 Federal University Of Technology Owerri Journal Series

 Journal

 Statistical Model Analysis Of Dependence On Motor Cycle Transport At Ifedore LGA Ondo Nigeria

 Oyedepo, O. J., And Etu J.

 2016

Motorcycle ownership model were formulated using Poisson Regression and Negative binomial logistic regression models. Three different zones were selected and classified based on their population density. Data which include factors affecting the ownership of motorcycles were collected by administering well structured questionnaires to the respondents. Data obtained were analyzed with Statistical Package for Social Sciences version 22 (SPSS 22) to formulate predictive models. The two models show quite similar results as they both show that the number of motorcycles owned will reduce as educational status of the rider and average monthly income of household increases while there will be an increase in the number of motorcycles owned as the age range of the rider increases. The number of motorcycles owned is increased by 1.5 times for the lowest income category and 0.4times for the secondary education category; but this is reduced by 0.54 times for the highest age range of household head category. The test of model effects shows that all the predictor variables are significant. The results of the study will be helpful in low cost transportation planning for the study area. 

 Journal Of Applied Science And Process Engineering.

 Journal

 Poisson And Negative Binomial Regression Models Application In Modelling Car Ownership Behaviour In Akure, South West, Nigeria

 Oyedepo, O. J., And Etu J.

 2016

Increase in number of cars without commensurate increase in the number of transport facilities and infrastructures has led to diverse traffic problems in many Nigerian cities like Akure. Factors which contribute to increase in the numbers of cars owned in Akure metropolis were investigated in this study. The study area was divided into three density zones namely High, Medium and Low while, data was collected using well-structured household questionnaire survey distributed amongst residents; with the survey yielding a return of 1002 questionnaire out of the 1181 distributed. Results from field findings gave the average number of cars owned per household in the study area as 0.62. Results of the Poisson Regression Model show that a change in the number of employed household members will decrease the number of cars owned in the study area by 9% while, a unit increase in the number of driver’s license holders in the household, academic qualification and average monthly income of the household will increase the number of cars owned by 60%, 26% and 30% respectively. The negative binomial model indicates that a change in the number of employed household members will decrease the number of cars owned by 10% whereas a change in the number of driver’s license holders in the household and monthly income will lead to an increase in the number of cars owned by 101% and 24% respectively. The test of model effects affirm that all the predictor variables are statistically significant indicating a good fit for the model predicted. Out of the two models, Poisson regression model is found to be a superior model due to a higher log likelihood ratio Chi Square and improved statistically significant variables. The findings in this research will assist government agencies to plan future transportation infrastructure development. 

 Journal Of Applied Science And Process Engineering.

 Journal

 Evaluating Vehicular Delay Cost Of Congested Road Networks In Akure Ondo State.

 Oyedepo, O. J., And Afolayan A.

 2016

Estimate of the impact of congestion such as economic and productivity loss was evaluated along three selected routes namely RA, RB and RC in Akure using cost and delay. Travel speed, and Average Daily Traffic (ADT) were measured using cine camera; while fuel consumption was measured per litre using the vehicles fuel gauge. The annual person hours of delay (APHD) of 626.25 hrs, 918.51 hrs and 140.91 hrs was obtained for route A, B and C respectively. The daily wasted fuel cost for vehicle on RA, RB and RC are N785.83/day, N 959.9/day and N 130.5/day respectively, while N6,506.42/ day, N 7,676.63 and N 2,110.92 was obtained for total delay cost (TDC) on the RA, RB and RC. Also, fuel wasted associated with congestion for RA, RB and RC are 1,642,352.40 naira per year, 1,937,735.8 naira per year, and 532,838.80 naira per year respectively; this amount to economic loss. Provision of effective public transit, efficient off-street parking system, and enforcement of traffic rule and regulation were recommended as a panacea to traffic congestion problem in the study area. 

 The International Transport Planning Society

 Journal

 Predictive Modelling Of Entry Flow At Rotary Intersections In Akure, A Developing City And Capital Of Ondo State,

 Owolabi, A. O., Oyedepo, O. J. And Okoko E. E.

 2015

Predictive models for entry flow at rotary intersections in Akure - a developing city in Nigeria- have beendeveloped. Data were collected at the intersections critical to traffic flow in the study area using a cinecamera placed at a vantage point from the road sections during peak and off-peak periods in week days.Entry flow (qe) was modelled as a function of circulating flow (qc), delay (da), headway (h) and geometricfeatures of the intersections. The data were fitted to a multiple linear regression equation to obtain thegeneralized flow models for peak and off peak periods. The equations obtained were validated usingempirical data other than those used to calibrate the model. The adjusted R2 values obtained during thepeak and off peak periods were 95.8% and 87.7% respectively, indicating that the independent variables(circulating flow, delay and headway) made significant contributions in predicting the entry flow. Themodels developed can be used to evaluate entry flow at rotary intersections in the study area and othercities in developing countries with similar traffic characteristics for which such models are scarce,thereby facilitating planning and design of effective traffic control mechanisms. 

 Journal Of Building Materials And Structures

 Journal

 Performance Of Coconut Shell Ash And Palm Kernel Shell Ash As Partial Replacement For Cement In Concrete

 Oyedepo, O. J., Olanitori, L. M. And Akande, P. S.

 2015

High cost of cement used as binder in the production of concrete has led to a search for alternative. Using a mix design ratio of 1:2:4 and water binder ratio of 0.63, concrete cubes were casted using varying ordinary Portland cement (OPC): palm kernel shell ash (PKSA) and ordinary Portland cement (OPC): coconut shell ash (CSA) ratios of 100:0, 90:10, 80:20, 70:30 , 60:40 and 50:50 respectively. This research reveal that partial replacement of cement with 20% PKSA and CSA in concrete gives an average optimum compressive strength of 15.4 N/mm2 and 17.26 N/mm2 respectively at 28 days. While, the optimum value of compressive strength obtained at 28 days is 20.58 N/mm2 at 10% replacement with CSA. The value obtained is suitable for both light weight and heavy weight concrete respectively. Thus, the research show that the use of PKSA and CSA as a partial replacement for cement in concrete, at lower volume of replacement, will enhance the reduction of cement usage in concretes, thereby reducing the production cost and the environmental pollution caused by the dumping of the agricultural waste. 

 European International Journal Of Science And Technology

 Journal

 Post-Independence Evaluation Of Air Transport Safety In Nigeria

 Fadugba, O. G., Oluwajana, S. D. Busari, A. A., And Oyedepo, O. J.,

 2015

This research evaluates air transportation safety in Nigeria. Records of aircraft crashes in Nigeria wereextracted from different archives to create a database of air traffic incidences within the air space of Nigeria since Independence. Statistical overview of air transportation accidents in Nigeria using accident data to examine a national trend in air transportation disasters was carried out. Results of the analysis showed that air traffic accidents in Nigeria have increased per decade with 2 incidences between 1960 and 1969, 27 incidences between 2000 and 2009 with an increasing trend in the preceding decades. Impacts of season on aircraft accident in Nigeria were less significant. Airplanes constitute larger proportion of aircraft involved in accident with 86% incidences, and 14% for helicopter. Passenger plane constitute the largest proportion with 46 incidences occurring in the commercial plane category while 8 and 2 crashes occur in Military and Cargo operation. Majority of the accidents in Nigeria occurred in Lagos with 14 crashes involving plane majorly, followed by Abuja (FCT) and, Kano and Rivers with 4 each. Year 2005 however has the highest number of plane incidences in Nigeria with 11 crashes 

 Journal Of Transport Literature

 Journal

 Binomial Logistic Regression Model Of Household Motorcycle Ownership In Akure, Ondo State Nigeria

 Oyedepo, O. J. And Etu, J.

 2015

In order to forecast and make provisions for future demand of motorcycle in Akure, there is a need to understand factors driving motorcycle ownership, therefore, this study examines factors which affect motorcycle ownership in Akure metropolis. Three different zones namely, Low Density (LD), Medium Density (MD) and High Density (HD) were considered,, both close-ended and open-ended questionnaire were administered to 900 households representing 75% of the total population. Using Statistical Package for Social Sciences version 16 data were analyzed and binomial logistic regression analysis was used in developing a model which showed that only academic qualification of household head, number of household members and average monthly income of household significantly influences motorcycle ownership across the zones at the 95% confidence level. Both average monthly income of household and academic qualification of household head had a negative influence on motorcycle ownership whereas number of household members had a positive relationship with motorcycle ownership. The results shows that there is a 1.43 times likelihood of owning a motorcycle with a unit increase in the number of household members, while there is a reduction in the likelihood of owning a motorcycle by 1.66 times and 2.17 times for a unit increase in the average monthly income and academic qualification of household head respectively. The results obtained can be used in developing policy framework to improve public transport and control motorcycle ownership in the city of Akure. 

 Journal Of Engineering And Architecture.

 Journal

 Effect Of Pit Sand On Compressive Strength Of Coconut Shell Concrete

 Olanitori, L. M. And Oyedepo, O. J

 2015

The high and rising cost of building materials is one of the major factors affecting housing delivery in Nigeria. Therefore, there is the need to reduce the cost of building construction either through effective construction management or usage of alternative available local materials. Concrete is one of the most important building materials in Nigeria presently, however, one of its major disadvantage, is its high self-weight compared to other construction materials. Hence research focused towards producing a lightweight concrete from locally available material, which will reduce the total self-weight of the structure, with corresponding reduction in cost is of national interest. This work investigated the effect of pit sand on the mechanical properties of concrete produced using coconuts hells as a replacement for coarse aggregate. Two batches of concrete mix were produced using coconuts hells as aggregate, with mix ratios 1:2:4. One of the batches was produced using unwashed sand from borrowed pit, while the second batch was produced using washed sand respectively. From each batch of concrete mix, 20 concrete cubes of size 150 mm x 150 mm x 150 mm were produced and cured by immersion in water in curing tanks. Cubes produced using unwashed sand were named specimen A, while that produced from washed sand were named specimen B. The research shows that there is increase in the compressive strength of concrete produced from washed sand over that produced using unwashed sand. Also, concrete produced by 25% partial replacement of crushed granite by coconut shell using unwashed sand and 25% to 75% partial replacement for washed sand, can be used for structural purposes. 

 Malaysian Journal Of Civil Engineering

 Journal

 Investigation Of Palm Kernel Shell As Partial Replacement For Aggregate In Asphaltic Concrete

 Oyedepo, O. J., Olanitori, L. M. And Olukanni, E. O.

 2015

Palm kernel shell (PKS) is used as a partial replacement for fine and coarse aggregates in asphalt. Crushed palm kernel shell (CPKS) and PKS were added at 20, 40, 50, 60 and 80% by weight of total aggregates to partially replace the fine and coarse aggregates in asphaltic concrete. Properties such as aggregate impact value, aggregate crushing value, bitumen penetration test and Marshall Stability test were performed in accordance with ASTM D 6927 – 06. From the analysis, CPKS has a stability value of 1,033kg at 20% replacement, 660kg, 646kg, 566kg and 528kg at 40%, 50%, 60% and 80% replacements respectively; while, PKS has a stability value of 2,860kg at 20% replacement, 2,398kg, 2,343kg, 2,156kg and 2,123kg at 40%, 50%, 60% and 80% replacements respectively. Comparing with ASTM D448-12, PKS can be used as alternative material for coarse aggregate for light, medium and heavy traffic roads while, 20% of CPKS can be used as fine aggregates in heavy traffic road and 60% in medium traffic roads. It is therefore recommended that this agro-based product can be used as partial alternate material in asphaltic concrete to reduce the cost of construction.