Review Reports

Round 1

Reviewer 1 Report

Please see the attached file.

Comments for author File: Comments.pdf

Well-written overall; I highlighted several unclear passages in my review.

Author Response

Please see attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

This study investigated a vehicle size enhancement method in CMS systems. The idea and experiments are interesting. The analysis of results is reliable. I like this paper. However, there are some minor issues that need to be considered, as follows:

1. "This has the potential to improve the rearward view of drivers and 29 consequently reduce lane change crashes, which account for up to 10% of all crashes re-30 ported on U.S. roadways." needs citations

2. line 46. Tau-hypothesis has been questioned for a long time.  TTC estimation is dependent on the tasks and scenarios. the authors should add more literature to demonstrate the TTC estimation in Car following scenarios.

3. line 55. It should note that humans make decisions based on multiple cues, such as TTC, vehicle speed, and driving behaviour. When driver A notices that B is yielding, there is not always necessary for A to estimate TTC. A could make a decision based on the yielding behaviour. reference 

Tian, K., Tzigieras, A., Wei, C., Lee, Y.M., Holmes, C., Leonetti, M., Merat, N., Romano, R., Markkula, G., 2023. Deceleration parameters as implicit communication signals for pedestrians’ crossing decisions and estimations of automated vehicle behaviour. Accident Analysis & Prevention 190, 107173.   4.  line 210. Specify the combination of independent variables 5.  figure 4. Why don't you separate the two rows of figures, just like you discussed them separately? The X-axis needs to be adjusted so that the line is centered on the figure 6. line 236. This explanation is questionable.  As actual TTCs increase, the estimated TTCs must increase as well. The main effects of TTC cannot attribute to size speed bias. 7. line 253. In Figure 4, it seems that as speed increases, the estimated TTCs also increase. Please include this effect and discuss it.

 

Author Response

Please see attachment.

Author Response File: Author Response.docx

Round 2

Reviewer 1 Report

The authors addressed all my comments; the manuscript is ready to be published now.