To conduct a literature review on sentiment analysis of traffic congestion in Harare, Zimbabwe, you can follow these steps:

1. Define your research question: Clearly articulate the specific aspect of sentiment analysis of traffic congestion in Harare, Zimbabwe that you want to explore. For example, you may focus on understanding the sentiment of social media posts related to traffic congestion in Harare.

2. Identify relevant keywords: Identify keywords and phrases related to your research question. These may include terms such as "traffic congestion," "sentiment analysis," "Harare," "Zimbabwe," "social media," and any other specific terms related to your research focus.

3. Search academic databases: Use scholarly databases such as Google Scholar, JSTOR, or ACM Digital Library to search for relevant academic articles, conference papers, and other publications. Use your identified keywords to conduct a comprehensive search. You can also use advanced search options to filter results based on publication date, author, or specific journals.

4. Evaluate and select sources: Evaluate the relevance and credibility of the sources you find. Look for articles published in reputable journals, written by experts in the field, and based on rigorous research methodologies. Review the abstracts, introductions, and conclusions of the articles to determine their suitability for your literature review.

5. Read and synthesize the literature: Read the selected articles and take notes on the key findings, methodologies used, and any relevant insights. Identify common themes, trends, and gaps in the existing literature. Organize your notes and create an annotated bibliography to keep track of the sources you have reviewed.

6. Analyze and interpret the literature: Analyze the findings from the literature and interpret them in the context of your research question. Identify patterns, contradictions, and areas that need further exploration. Consider the limitations and strengths of the existing studies.

7. Write your literature review: Organize your findings and insights into a coherent and well-structured literature review. Start with an introduction that outlines the purpose of your review and provides background information on the topic. Then, present the key themes and findings from the literature, discussing their relevance to your research question. Finally, conclude by summarizing the main points and highlighting any gaps or areas for future research.

Remember to cite all the sources you have used following the appropriate citation style (e.g., APA, MLA) and to critically analyze and synthesize the literature to provide a comprehensive overview of the sentiment analysis of traffic congestion in Harare, Zimbabwe.