Two Stop-Line Method for Modern T-Shape Roundabout: Evaluation of Capacity and Optimal Signal Cycle

Table 2

Left-turn capacity analysis of the proposed model.

Signal cycle length	Aimsun simulator benchmark values (Pcu/h)	Model without considering internal space area		Proposed TLSR-2SL model considering internal space area		Improved ratio of accuracy level by using TLSR-2SL (%)
		Results (Pcu/h)	Relative error (%)	Results (Pcu/h)	Relative error (%)
60	293	304	3.8	305	4.1	−0.4
75	413	318	−23.0	375	−9.2	13.9
90	406	329	−19.0	459	13.1	5.9
105	489	337	−31.1	494	1.02	30.1
120	523	346	−33.8	538	2.9	30.9
135	474	349	−26.4	496	4.6	21.9
150	397	351	−11.6	425	7.05	4.6
160	426	354	−16.9	404	−5.16	11.7