A problem in assessing the effectiveness of small roundabouts over time
In this study, a generalised linear modelling technique is applied to the number of accidents and traffic flow (total flow into the roundabout) for several small roundabouts in Newcastle upon Tyne for the years 1974 to 1992. There is a multicollinearity problem since there exists a high correlation...
| Main Author: | |
|---|---|
| Format: | Article |
| Published: |
Universiti Kebangsaan Malaysia
2000
|
| Online Access: | http://journalarticle.ukm.my/3783/ http://journalarticle.ukm.my/3783/ |
| id |
ukm-3783 |
|---|---|
| recordtype |
eprints |
| spelling |
ukm-37832012-03-20T02:06:07Z http://journalarticle.ukm.my/3783/ A problem in assessing the effectiveness of small roundabouts over time Kamarulzaman Ibrahim, In this study, a generalised linear modelling technique is applied to the number of accidents and traffic flow (total flow into the roundabout) for several small roundabouts in Newcastle upon Tyne for the years 1974 to 1992. There is a multicollinearity problem since there exists a high correlation between traffic flow variable and time variable as there has been an increase in traffic flow over time. Traffic flow is an important explanatory variable and cannot be dropped from the model. The conclusion regarding the effectiveness of small roundabouts over time can only be made under a weak assumption of accidents are proportional to flow. Based on this assumption, there appears to be no evidence of the reduction of the effectiveness of the small roundabouts over time. Universiti Kebangsaan Malaysia 2000 Article PeerReviewed Kamarulzaman Ibrahim, (2000) A problem in assessing the effectiveness of small roundabouts over time. Sains Malaysiana, 29 . pp. 81-92. ISSN 0126-6039 http://www.ukm.my/jsm/english_journals/vol29_2000/vol29_00page81-92.html |
| repository_type |
Digital Repository |
| institution_category |
Local University |
| institution |
Universiti Kebangasaan Malaysia |
| building |
UKM Institutional Repository |
| collection |
Online Access |
| description |
In this study, a generalised linear modelling technique is applied to the number of accidents and traffic flow (total flow into the roundabout) for several small roundabouts in Newcastle upon Tyne for the years 1974 to 1992. There is a multicollinearity problem since there exists a high correlation between traffic flow variable and time variable as there has been an increase in traffic flow over time. Traffic flow is an important explanatory variable and cannot be dropped from the model. The conclusion regarding the effectiveness of small roundabouts over time can only be made under a weak assumption of accidents are proportional to flow. Based on this assumption, there appears to be no evidence of the reduction of the effectiveness of the small roundabouts over time. |
| format |
Article |
| author |
Kamarulzaman Ibrahim, |
| spellingShingle |
Kamarulzaman Ibrahim, A problem in assessing the effectiveness of small roundabouts over time |
| author_facet |
Kamarulzaman Ibrahim, |
| author_sort |
Kamarulzaman Ibrahim, |
| title |
A problem in assessing the effectiveness of small roundabouts
over time |
| title_short |
A problem in assessing the effectiveness of small roundabouts
over time |
| title_full |
A problem in assessing the effectiveness of small roundabouts
over time |
| title_fullStr |
A problem in assessing the effectiveness of small roundabouts
over time |
| title_full_unstemmed |
A problem in assessing the effectiveness of small roundabouts
over time |
| title_sort |
problem in assessing the effectiveness of small roundabouts
over time |
| publisher |
Universiti Kebangsaan Malaysia |
| publishDate |
2000 |
| url |
http://journalarticle.ukm.my/3783/ http://journalarticle.ukm.my/3783/ |
| first_indexed |
2023-09-18T19:39:46Z |
| last_indexed |
2023-09-18T19:39:46Z |
| _version_ |
1777405512297480192 |