Below are charts and maps tabulating Annual Average Daily Traffic (AADT) counts on San Antonio's freeways for 2021. The comments, rankings and calculations are the author's own analysis based on raw data from TxDOT.

The stats below are area-wide. For traffic counts only on a specific corridor, see that freeway's individual page elsewhere on this site.

Summary

Traffic counts for 2021 were, frankly, a mess. First, traffic was still recovering from the pandemic, resulting in a few areas of uneven recovery. Second, TxDOT made quite a few changes to their traffic measuring stations in San Antonio, adding several new locations, retiring a few, and slightly relocating several counters. These changes also may have skewed some comparisons to previous years.

That said, some semblance of normality was noted along with a few surprises that may or may not hold up in subsequent years. For example, a segment of Loop 410 returned to 300,000+ vehicles a day, but it was the segment east of Nacogdoches, which is the first time this segment has reached that milestone. Meanwhile, the previously most-traveled freeway segment, Loop 410 from McCullough west to I-10, dropped down a few notches. Another surprise on Loop 410 was that the segment immediately west of I-10 is now the second busiest in the city; this is one of the new counter locations, so there is no historical data for this specific segment and therefore no way to know where this location ranked previously.

Nine of the top 20 traffic counts were on Loop 410 North. One was downtown, and the remainder evenly split on I‑10 West and I-35 North.

With the pandemic depressing traffic levels in 2020, I chose to use a two-year window for this year's short-term growth comparison, comparing 2019, which was pre-pandemic, to last year. This produced mostly expected results. The top growth spot was on Loop 1604 north of Potranco, with traffic there surging almost 43% from 2019. A surprise was the #2 spot, on I-35 south of Fischer Rd. This might be due to a new Amazon warehouse and other industrial growth in that area. A string of four of the top 20 locations was along I-35 in Schertz. The rest were widely scattered along I-10 East and West and I-37 at Loop 410. A lone spot on Loop 410 at Bandera Rd. rounded-out this list.

Finally, the growth over the last decade also produced mostly expected results. The top three locations all showed traffic more than doubling over the decade. Five of the top nine locations were in the Loop 1604 West corridor (one being just east on SH 151.) Six of the top 20 were on the South Side along or immediately adjacent to Loop 410. Three were along I-10 East east of Loop 410, a cluster of three were located on the eastern half of Wurzbach Pkwy., two were out on I-10 West in the Leon Springs area, and a lone location on Loop 410 North at McCullough rounded-out the list. (That Loop 410/McCullough location is likely due to an anomaly in the 2011 count.)

General statistics

Number in parenthesis is the San Antonio Urbanized Area's rank nationally for that category.

• Centerline miles of freeway: 253 (23)
  • Interstate highway miles: 177
  • US and State highway freeway miles: 76
• Percent of local roads that are freeways: 3.10% (21)
• Lane miles of freeway: 1,419 (23)
• Lane miles per 1,000 people: 0.807 (17)
  
• Daily vehicle miles driven on freeways: 22,213,000 (21)
• Percent of total local daily traffic carried on freeways: 48.5% (11)

(Source: Federal Highway Administration, 2020 data)

Average 2021 daily traffic by location

Freeway traffic volumes (2021 AADT)
Segment breaks are approximate

	FWY	LOCATION	2021 AADT	'19-'21 % CHG
1		E of Nacogdoches Rd.*	300,835	N/A
2		W of Fredericksburg Rd.*	290,292	N/A
3		E of McCullough Ave.**	281,365	-3.55%
4		Cherry Ridge Dr.**	280,458	+1.61%
5		E of Blanco Rd.	267,693	-12.43%
6		S of Thousand Oaks	243,909	+3.56%
7		N of Callaghan Rd.**	237,094	-1.67%
8		N of O'Connor Rd.	236,781	+1.96%
9		S of Bandera Rd.	236,447	+8.36%
10		W of Evers Rd.	236,098	+3.27%
11		S of Crossroads Blvd.**	219,228	+6.38%
12		N of Walzem Rd.	218,126	+7.87%
13		S of Culebra Rd.*	217,522	N/A
14		Bexar/Guadalupe line	217,401	+26.57%
15		E of Honeysuckle Ln.*	214,718	N/A
16		N of DeZavala Rd.**	202,353	+1.67%
17		N of McCullough Ave.	184,530	-6.26%
18		S of Walzem Rd.	183,715	-13.69%
19		N of Huebner Rd.	183,673	+0.71%
20		N of UTSA Blvd.	183,419	+17.51%
21		W of New Braunfels Ave.	183,377	+4.36%
22		S of FM 3009	182,384	+22.83%
23		W of Frio St.	178,837	-4.52%
24		S of Rittiman Rd.	175,867	-13.99%
25		S of Brookhollow Dr.	173,472	+2.55%
26		W of Perrin-Beitel Rd.	166,438	N/A
27		S of Laredo St.	160,584	-6.60%
28		S of US 90	159,854	+1.04%
29		S of Commerce St.**	155,500	N/A
30		E of Bitters Rd.	154,706	-5.79%
31		N of Cibolo Valley Dr.	151,947	+20.24%
32		N of Salado Creek	151,727	+5.54%
33		E of Perrin-Beitel Rd.	150,837	-7.50%
34		N of Loop 1604W	150,152	+23.69%
35		E of Probandt St.	147,822	-1.02%
36		E of Cupples Rd.**	146,449	-2.13%
37		W of Probandt St.	146,320	-2.20%
38		E of Zarzamora St.	145,201	-12.38%
39		N of FM 2252	142,456	+21.42%
40		W of General McMullen Dr.*	141,232	N/A
41		N of Marbach Rd.*	140,795	N/A
42		S of I-35	140,216	-11.92%
43		N of Hildebrand Ave.	136,247	-19.77%
44		N of I-10E*	135,259	N/A
45		N of Fair Ave.	133,629	-3.42%
46		S of Hildebrand Ave.*	133,592	N/A
47		N of Dominion Dr.	131,740	+34.02%
48		S of Culebra Rd.	131,343	+14.03%
49		N of I-35*	130,102	N/A
50		N of Culebra Rd.	128,082	+7.27%
51		E of Potranco Rd.	127,629	+5.65%
52		W of NW Military Hwy.*	127,585	N/A
53		E of Gold Canyon Rd.**	126,961	+0.52%
54		Vance Jackson Rd.	126,819	-13.67%
55		N of Basse Rd.	119,366	-20.44%
56		S of Sunset Rd.	119,065	-20.90%
57		W of I-10W	116,488	-13.54%
58		S of Nakoma Rd.	116,344	-40.27%
59		S of Bandera Rd.	115,987	+13.37%
60		N of US 90W	113,034	-11.17%
61		W of I-35N	111,655	-11.93%
62		W of O'Connor Rd.	111,204	-5.91%
63		S of Braun Rd.*	108,514	N/A
64		N of Bandera Rd.	108,092	-20.61%
65		W of Hunt Ln.	106,950	+1.74%
66		N of SW Military Dr.	106,517	-8.28%
67		N of Lookout Rd.	103,520	-15.98%
68		S of US 90W	103,402	-14.91%
69		N of George Beach Ave.**	101,569	-18.25%
70		N of Hot Wells Blvd.	101,143	-2.48%
71		N of Hausmann Rd.	101,084	-13.16%
72		S of Loop 1604	101,021	-5.31%
73		W of Gevers St.	100,519	+12.95%
74		W of US 281N	100,343	-23.49%
75		N of Nacogdoches Rd.**	93,214	-17.87%
76		S of Loop 410**	91,941	+8.49%
77		N of Medina Base Rd.*	91,829	N/A
78		W of Military Dr.	89,173	-0.72%
79		N of Loop 410	86,872	+17.15%
80		N of Zarzamora St.	86,323	-4.92%
81		N of US 90	84,625	-2.34%
82		N of Pat Booker Rd.	84,141	-17.70%
83		N of SW Military Dr.	83,950	-2.54%
84		S of Loop 410	83,882	-10.67%
85		E of Martin Luther King Jr. Dr.	83,311	+6.98%
86		S of Fischer Rd.	82,263	+37.92%
87		N of FM 3351	81,446	+0.87%
88		E of WW White Rd.	81,224	+1.76%
89		W of Hunt Ln.	80,978	-2.79%
90		E of Foster Rd.	80,830	+7.08%
91		W of WW White Rd.	80,225	+2.77%
92		N of I-10E	80,020	-3.19%
93		E of Loop 410	79,979	-3.26%
94		S of I-10E	79,506	-4.86%
95		S of Pat Booker Rd.	79,271	+27.47%
96		E of Callaghan Rd.*	79,202	N/A
97		E of Loop 1604	79,091	+16.82%
98		S of E. Houston St.	77,434	-1.43%
99		E of Old Hwy 90	76,940	-4.42%
100		S of SH 151*	75,535	N/A
101		W of Loop 1604E	75,457	+15.52%
102		N of Loop 410	75,069	-25.07%
103		S of Pearsall Rd.*	72,766	N/A
104		N of Pearsall Rd.	68,998	-9.79%
105		S of Potranco Rd.*	67,160	N/A
106		N of FM 78	65,960	-8.15%
107		S of Rigsby	64,697	-1.51%
108		E of Ackerman Rd.**	64,529	+13.14%
109		W of FM 78	61,928	-8.33%
110		E of Loop 1604E	60,663	+7.72%
111		N of Loop 1604*	58,644	N/A
112		S of Southcross Blvd.	58,550	-4.62%
113		W of Roosevelt Ave.	58,048	-2.72%
114		W of I-37	55,731	-8.19%
115		E of I-37	54,333	-3.59%
116		W of US 281N*	53,403	N/A
117		W of Loop 1604	50,704	-5.00%
118		E of Poteet-Jourdanton Fwy.	50,605	-4.78%
119		N of Somerset Rd.	48,915	-2.87%
120		E of Roosevelt Ave.	47,189	-10.56%
121		E of Somerset Rd.	46,956	-5.04%
122		N of New Laredo Hwy.	46,776	-3.73%
123		E of I-35S*	45,988	N/A
124		N of US 90W	45,285	+9.96%
125		N of Potranco Rd.	45,023	+42.80%
126		W of West Ave.	42,004	-10.85%
127		E of FM 78	40,724	-2.81%
128		E of Starcrest Blvd.	40,385	-23.50%
129		E of Perrin-Beitel Rd.	38,522	-28.43%
130		E of Wetmore Rd.	37,636	-23.50%
131		E of US 281N	34,075	-23.50%
132		E of NW Military Hwy.	20,715	-49.15%
133		E of Weidner Rd.	20,168	-20.39%
134		S of US 90	14,378	-6.61%
135		At Port SA	10,938	-26.10%

* New location or substantial relocation of an existing location
** Location slightly moved

Top 20 AADT locations (2021)

 

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Top 20 two-year growth locations

This year, this table reflects growth from 2019 (pre-pandemic) to 2021.

	FWY	LOCATION	'19-'21 % CHG
1		N of Potranco Rd.	+42.80%
2		S of Fischer Rd.	+37.92%
3		N of Dominion Dr.	+34.02%
4		S of Pat Booker Rd.	+27.47%
5		Bexar/Guadalupe line	+26.57%
6		N of Loop 1604W	+23.69%
7		S of FM 3009	+22.83%
8		N of FM 2252	+21.42%
9		N of Cibolo Valley Dr.	+20.24%
10		N of UTSA Blvd.	+17.51%
11		N of Loop 410	+17.15%
12		E of Loop 1604	+16.82%
13		W of Loop 1604E	+15.52%
14		S of Culebra Rd.	+14.03%
15		S of Bandera Rd.	+13.37%
16		E of Ackerman Rd.	+13.14%
17		W of Gevers St.	+12.95%
18		N of US 90W	+9.96%
19		S of Loop 410	+8.49%
20		S of Bandera Rd.	+8.36%

Top 20 one-year AADT growth locations (2019-2021)

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Top 20 growth locations since 2011

	FWY	LOCATION	2021 AADT	'11-'21 % CHG
1		N of Culebra Rd.	128,082	+156.16%
2		N of US 90W	45,285	+146.11%
3		S of Fischer Rd.	82,263	+105.66%
4		E of McCullough Ave.	281,365	+91.40%
5		N of Potranco Rd.	45,023	+87.60%
6		S of Culebra Rd.	131,343	+82.42%
7		N of Dominion Dr.	131,740	+78.03%
8		E of Perrin-Beitel Rd.	38,522	+67.49%
9		E of Loop 1604	79,091	+64.77%
10		E of Poteet-Jourdanton Fwy.	50,605	+63.24%
11		E of Starcrest Blvd.	40,385	+61.54%
12		W of Loop 1604E	75,457	+60.55%
13		E of Loop 1604E	60,663	+59.64%
14		E of Ackerman Rd.	64,529	+57.39%
15		N of FM 3351	81,446	+56.63%
16		S of Loop 410	91,941	+50.72%
17		E of Wetmore Rd.	37,636	+50.54%
18		N of Loop 410	86,872	+49.78%
19		W of Roosevelt Ave.	58,048	+48.84%
20		E of Somerset Rd.	46,956	+46.74%

Top 20 AADT growth locations 2011-2021