According to the query of the original force document, the standard traffic flow loan methods for highway financing access mainly include the following types:

1. Bank loan: Banks are the main source of highway financing. One of the channels. Bank loans can provide medium and long-term loan services based on the different needs and scale of the project. At the same time, reasonable repayment methods and interest rates can be determined based on the project's income and cash flow.

2. Bond issuance: Highway projects can be financed through the issuance of corporate bonds or local government bonds. Bond issuance can provide a large amount of financial support with low financing costs and long financing terms.

3. Asset securitization: Asset securitization is a financing method that converts the assets of highway projects into securitized products and raises funds by selling securitized products. Asset securitization can provide stable cash flow support through the construction of asset pools while reducing the financial risks of the project.

4. Equity financing: Equity financing is a financing method that attracts investors by selling the equity of the highway project company. Equity financing can provide more financial support for projects, while introducing strategic investors and improving the company's governance structure and operating standards.

5. PPP model: The PPP model is a public-private partnership model in which the government and private capital jointly bear the investment and operational risks of highway projects. The PPP model can introduce more social capital to participate in infrastructure construction and improve the operational efficiency and profitability of the project.